Do you know how to list contents (files/directories) in Linux?
It’s straightforward.
In this article, you will learn what the ls command and its use is.
Promise me, you will read this article entirely, and I promise you that the concept of your ls command will be cleared till the end of this article.
In my opinion, if someone starts learning Linux, the first command he should learn is ls command.
Table of Contents
What is the use of ls command?
In simple language, ls command helps to list the contents of a directory in Linux with useful information.
ls command provides the following information’s:
- Permission details
- Content owner and group information
- Modified Date and Time
- Size (Normally
lslists sizes in Bytes, but we can also check the size in Human Readable format) - Inode information and so on
Note: What we call a folder in Microsoft Windows is called a directory in Linux.
We usually use Microsoft Windows, and we are experts in it, that’s why I compare my Linux articles with Windows similar features so that your concept becomes clear.
What will you do if you want to list the contents of any directory in Microsoft Windows?
Just double click on the folder whose contents you want to list, and its contents will be listed in front of you because Windows is a GUI (Graphical User Interface) based operating system.
Similarly, since Linux provides us with a Command Line Interface (CLI), we have to use the ls command to see what is inside a directory.
ls was initially introduced in the Unix operating system, and as Linux is made up of the Unix OS, we are using this command in Linux.
How to remember Linux commands?
Often people ask how to remember Linux commands easily. I have an excellent trick to remember these commands.
Here it is:
Most of the commands of Linux are derived from ordinary words. Hence this command can be easily remembered. Here some examples:
lscommand came from the Word “List.“mkdircommand came from the phrase “Make Directory.“rmdircommand came from the phrase “Remove Directory.“ducommand came from the phrase “Disk Usage.“pwdcommand came from the phrase “Print Working Directory” and so on…
Suggested Read:
So, let’s try to understand ls commands and all its options with example.
Every command of Linux comes with many options, and by using these options, we can use the complete features of that command.
In the table below, you will find all the options related to this command.
| Options | Explanation |
|---|---|
| -l | Long listing of Files & Directories |
| --author | Print authors of the Content |
| ~ | Display the contents of Home Directory |
| -a | List Hidden Files & Directories |
| -A | do not list implied (.) and (..) |
| -R | Print Files & Directories Recursively |
| -d | List directory themselves and not their content |
| -h | Display size in Human Readable format |
| -1 | Display one File/Directory per line |
| -s | Print the allocated size of each File & Directory |
| -F | Display files & directories with different indicators at the end |
| -i | List Inode numbers |
| -x | Display the contents in a line pattern |
| -m | List contents in a comma-separated format |
| -Q | Display content names within Quotes |
| -n | Display UID and GID of Files & Directories |
| -g | Only list Group names in a long listing format |
| -G | Only list Owner names in a long listing format |
| -u | List Files & Directories as per Access Time |
| -r | List files & directories in Reverse order |
| -S | Sort contents as per its Size |
| -t | Sort contents as per its Modification Time |
| --hide | Exclude/Hide file types from the List |
| --time-style="+%Y-%m-%d $newline%m-%d %H:%M" | Display contents by different styled modified date format |
| -X | Sort files as per its Extension |
| --color=auto --color=yes --color=no --color=never | Enable/Disable colors in Output |
| --help man | Help/Manual page access |
| --version | Check the version of ls command |
You can use these options with its core command with the help of hyphen (-).
For example:
~$ ls -lHere ls is the core command, and -l is the option.
Note: You can also address the option as a flag.
Syntax:
You have to follow the below syntax to use ls command.
ls [OPTION]... [FILE]...1. Simple listing of Files & Directories
Run the following command to list the files and directories of the current directory in a simple format.
You can check your current directory using the pwd command.
By default, it lists the contents in alphabetical order.
Output:
~$ ls
Desktop Documents Downloads examples.desktop Music Pictures Public Templates Videos
What you see in blue is the directory, and What you see in white is the file.
Almost all Linux distributions have this similar color pattern.
2. Long listing of Files and Directories
You can use the -l (It’s lowercase L) option to list contents in a long listing format.
Output:
~$ ls -l
total 44
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Videos
As you can see, the output is divided into Seven columns with a lot of useful information related to files and directories.
So let’s try to understand one by one.
Column #1: First, we will understand the permission section :
- The first character indicates the file type. Linux has many file types. Refer to the list below:
| File Type | Explanation |
|---|---|
| - | Regular File |
| d | Directory |
| n | Network File |
| l | Symbolic Link |
| c | Character Special File |
| s | Socket |
| b | Block Special File |
| p | Pipe (FIFO) |
- In Linux, permission has been divided into nine characters, which are distributed in User, Group, and others.
The first three characters belong to the Owner (---), Next three characters belong to Group (---), and Finally, the last three characters belong to Others (---). Refer to the snapshot above.
Let me tell you a little bit about how to recognize permissions. Like any other operating system, we have three types of permission in Linux :
r– Readw– Writex– Execute
Read Also:
- chmod command: Understanding Linux File Permissions
- Special File Permissions in Linux (SUID, SGID and Sticky Bit)
Now that we have understood the file types and permissions, let’s move toward other information that we got in a long listing of contents and try to understand them.
- Column #2: Hard links belong to the file.
- Column #3: Owner of the file/directory
- Column #4: Group to which the file/directory belongs
- Column #5: Size (By Default prints in Bytes but we can display them in a human readable format)
- Column #6: Last Modified Month, Date & Time
- Column #7: Name of Files & Directories
You can also use the following command to long listing of contents.
~$ llThis is an alias of the ls -l command, and by default, you will find this in every Linux distribution.
3. List authors of the contents
Now, as you know that using -l option we can list owner and group details.
There are many chances that the owner and the author can be the same.
I thought it necessary to include it in this guide because it is a feature of ls.
So to list the authors of the content you can use --author option. You have to use this option with the combination -l.
Output:
~$ ls -l --author
total 52
drwxr-xr-x 4 ubuntu ubuntu ubuntu 4096 Jun 4 23:46 data
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Jun 4 05:39 data1
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Documents
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 ubuntu ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
-rw-r--r-- 1 ubuntu ubuntu ubuntu 0 Jun 4 22:19 file.txt
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu ubuntu 4096 Apr 28 05:25 Videos
4. List contents of a specific Directory
You can list the contents of a specific directory using ls command.
To do so, pass the path of the directory to the ls.
Here is an example:
I want to list the contents of Documents/data/ directory.
~$ ls -l Documents/data/
total 0
-rw-r--r-- 1 ubuntu ubuntu 0 Apr 28 06:44 test1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 Apr 28 06:44 test2.txt
-rw-r--r-- 1 ubuntu ubuntu 0 Apr 28 06:44 test3.txt
-rw-r--r-- 1 ubuntu ubuntu 0 Apr 28 06:44 test4.txt
-rw-r--r-- 1 ubuntu ubuntu 0 Apr 28 06:44 test5.txt5. List contents of multiple Directories
This command is the same as the above one.
The only difference is we have to mention the path of multiple directories instead of one.
Let me show you an example.
Here I want to list the contents of the following directories :
- data1
- data2
- data3
So the command would be:
~$ ls -l data1 data2 data3
data1:
total 0
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 file1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 file2.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 file3.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 file4.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 file5.txt
data2:
total 0
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 test1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 test2.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 test3.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 test4.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:40 test5.txt
data3:
total 0
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:41 data1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:41 data2.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:41 data3.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:41 data4.txt
-rw-r--r-- 1 ubuntu ubuntu 0 May 2 06:41 data5.txt6. List contents of the Home Directory
You don’t have to mention the entire path of the home directory to list the contents.
All you have to do is pass the Tilde (~) Special character to ls because Tilde (~) Indicates Home Directory in Linux.
Example:
~$ ls -l ~
total 44
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Videos7. List contents of Parent Directory
Let me explain to you what is the parent and current directory.
The directory within which the current directory exists is called the parent directory.
The directory in which i am working now is called the current directory, also known as Working Directory.
In this example my current directory is /home/ubuntu/data.
~/data$ pwd
/home/ubuntu/data
~/data$ ls
dir1 dir2 file1.txt file2.txt file3.txt file4.txt file5.txtBut our purpose is to list the contents of the parent directory.
In this case, its /home/ubuntu.
To do so, type the following command.
~/data$ ls ../
data Desktop Downloads file1.txt Music Public Videos
data1 Documents examples.desktop file.txt Pictures TemplatesYou can also list the contents of 2nd & 3rd level Parent Directories.
ubuntu@ubuntu:~/data$ ls ../../
ubuntu
ubuntu@ubuntu:~/data$ ls ../../../
bin dev initrd.img lib64 mnt root snap sys var
boot etc initrd.img.old lost+found opt run srv tmp vmlinuz
cdrom home lib media proc sbin swapfile usr
8. List only files using ls command
By default, ls lists all available contents of a requested directory, but you can list only files using the following command.
~$ ls -l | egrep -v '^d'
total 80
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
-rw-r--r-- 1 ubuntu ubuntu 23 May 1 07:18 file1
-rw-r--r-- 1 ubuntu ubuntu 21 May 1 07:01 file1.txtx
-rw-r--r-- 1 ubuntu ubuntu 0 May 1 06:56 file29. List only directories
To list only directories instead of all contents, use the following commands.
Method 1:
ubuntu@ubuntu:~$ ls -l | grep "^d"
drwxr-xr-x 2 ubuntu ubuntu 4096 May 1 05:46 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 docs
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 my
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 20480 May 1 07:13 test
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 VideosSuggested Read: grep Command: Search for a pattern in a file
Method 2:
~$ ls -ld */10. List hidden Files and Directories
How to identify hidden files and directories in Linux?
It’s Simple.
In Linux, the file or directory that starts with a period (.) is hidden.
So to list the Hidden contents use -a option with ls.
~$ ls -a
. .bashrc docs file1.txtx .mozilla .profile Templates
.. .cache Documents .gnupg Music Public Videos
.bash_history .config Downloads .ICEauthority my .ssh
.bash_logout Desktop examples.desktop .local Pictures .sudo_as_admin_successfulAs you can see, Implied is also listed in the above output.
.– for Current Directory..– for Parent Directory
If you don’t want to list Implied pass the -A option to ls.
~$ ls -A
.bash_history data examples.desktop .local Public
.bash_logout data1 file1.txt .mozilla .ssh
.bashrc Desktop file.txt Music .sudo_as_admin_successful
.cache Documents .gnupg Pictures Templates
.config Downloads .ICEauthority .profile Videos11. Recursively list the contents of Directories and Sub-Directories
What is Recursive?
Recursive means the executed command in Linux will work on a complete directory tree.
As per the following scenario, if I run the ls command to list the contents of the directory dir1 recursively, it will display the contents of all three directories (dir1, dir2 & dir3).
To list contents, recursively pass the -R option to ls.
Example:
Here I am listing the contents of the directory data, which has two sub-directories i.e., dir1 & dir2.
~$ ls -R data
data:
dir1 dir2 file1.txt file2.txt file3.txt file4.txt file5.txt
data/dir1:
f1.txt f2.txt f3.txt f4.txt f5.txt
data/dir2:
note1.txt note2.txt note3.txt note4.txt note5.txt
12. Display one File/Directory per line
Use the following command to list one file/directory per line.
Note: ls -1(It’s Numeric One)
~$ ls -1
Desktop
Documents
Downloads
examples.desktop
Music
Pictures
Public
Templates
Videos13. List directory themselves and not their content
To list the directories themselves instead of their content, pass the -d option to ls.
Refer to the following command.
~$ ls -ld data
drwxr-xr-x 4 ubuntu ubuntu 4096 Jun 4 05:25 data14. Display size in Human Readable format
Usually, ls command displays the size of the file or directory in Bytes, which is difficult to understand.
But if it displays the size of the file in Human Readable Format (GB, MB, KB), then it will be easy to understand, which is possible with the help of ls command.
- KB (K) – Kilo Bytes
- MB (M) – Mega Bytes
- GB (G) – Giga Bytes
To print the size in Human readable format, use the -h option. You have to use this option with the combination -l.
~$ ls -lh Documents/data/
total 40K
-rw-r--r-- 1 ubuntu ubuntu 1.4K Apr 28 06:51 rsyslog.conf
-rw-r--r-- 1 ubuntu ubuntu 19K Apr 28 06:51 services
-rw-r--r-- 1 ubuntu ubuntu 2.7K Apr 28 06:51 sysctl.conf
-rw-r--r-- 1 ubuntu ubuntu 1.3K Apr 28 06:51 ucf.conf
-rw-r--r-- 1 ubuntu ubuntu 4.9K Apr 28 06:51 wgetrc15. Print the allocated size of each File & Directory
Usually, ls command prints the file size in a long listing format, but if you want to display the size in the simple listing of contents, use the -s option.
~$ ls -hs
total 56K
4.0K Desktop 4.0K Documents 12K examples.desktop 4.0K Music 4.0K Pictures 4.0K Templates
4.0K docs 4.0K Downloads 4.0K file1.txtx 4.0K my 4.0K Public 4.0K Videos16. List files & directories with different indicators at the end
What is the use of Indicators?
Indicators are used to identify the file type. Here is the list of different types of indicators:
/– Directory|– Pipe@– Symlink.*– Executable files=– socket.
Use the -F option to append indicator to the entries.
~$ ls -F
data/ Desktop/ Downloads/ file1.txt@ Pictures/ Templates/
data1/ Documents/ examples.desktop Music/ Public/ Videos/17. List Inode numbers using ls command
What is the Inode number?
An Inode is a unique number in Linux that is assigned to files.
Whenever you create a new file, it is assigned a file name and an Inode number.
Inode number contains the following information’s:
- UID (User ID)
- GID (Group ID)
- File Size
- Permissions
- Modified Month, Date and Time
- Device ID
- Hard links
- Other meta information’s related to that file and many more.
Read Also: Explaining Soft Links And Hard Links in Linux
When you access a file, you use the name of that file from outside, but in the back end, it remains mapped to an Inode number that processes all requested tasks.
To print Inode numbers, you can use -i option.
~$ ls -li
total 44
659121 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop
659125 drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 Documents
659122 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
659057 -rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
659126 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
659127 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
659124 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
659123 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
659128 drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Videos
18. List contents by lines
By default, ls command lists the content by columns.
Pass the -x option to ls command to list entries by lines.
~$ ls -x
Desktop docs Documents Downloads examples.desktop file1.txtx Music my Pictures Public
Templates Videos19. List contents in a comma-separated format
You can list the contents in a comma-separated format.
To do so, Pass the -m option to ls command.
~$ ls -m
Desktop, docs, Documents, Downloads, examples.desktop, file1.txtx, Music, my, Pictures, Public,
Templates, Videos20. Print content names within Quotes
Use the -Q option with ls to print the content names withing Quotes.
Refer to the following sample output.
~$ ls -lQ
total 44
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 "Desktop"
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 "Documents"
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 "Downloads"
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 "examples.desktop"
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 "Music"
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 "Pictures"
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 "Public"
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 "Templates"
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 "Videos"21. Display UID and GID of Files & Directories
What is UID & GID?
By default, when we create a new user in Linux, it is assigned a UID and a GID.
- UID stands for User Identifier
- GID stands for Group Identifier
Let’s check the ID information of a user named helpdesk:
Usually, ls -l command lists the name of Owner and Group, but we can use the -n option to list UID & GID information.
~$ ls -ln
total 44
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:33 Desktop
drwxr-xr-x 3 1000 1000 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 1000 1000 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:25 Music
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:25 Public
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 1000 1000 4096 Apr 28 05:25 VideosSuggested Read:
22. Only display Group names in a long listing format
As we have seen, a long listing format lists both owner and group names.
But you can use the -g option to list only Group name instead of both.
~$ ls -lg
total 44
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 3 ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 ubuntu 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Videos23. Only display Owner names in a long listing format
If you want to list only Owner names, pass the -G option to ls.
~$ ls -lG
total 44
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 3 ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 ubuntu 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu 4096 Apr 28 05:25 VideosYou can also use the following command to get the same output.
~$ ls -o24. Print last access time of contents
You can display the last access time of files and directories using -u option.
~$ ls -lu
total 52
drwxr-xr-x 4 ubuntu ubuntu 4096 Jun 4 23:46 data
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:48 data1
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:39 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Downloads
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
lrwxrwxrwx 1 ubuntu ubuntu 27 Jun 4 21:59 file1.txt -> /home/ubuntu/data/file1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 Jun 4 22:19 file.txt
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:39 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 VideosWith the combination of -ltu option, you can sort the contents by its access time.
Latest accessed File/Directory will come in the first place.
~$ ls -ltu
total 52
drwxr-xr-x 4 ubuntu ubuntu 4096 Jun 4 23:46 data
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Videos
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 22:48 Downloads
-rw-r--r-- 1 ubuntu ubuntu 0 Jun 4 22:19 file.txt
lrwxrwxrwx 1 ubuntu ubuntu 27 Jun 4 21:59 file1.txt -> /home/ubuntu/data/file1.txt
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:48 data1
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:39 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:39 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop25. List files & directories in Reverse order
With the help of -r option, you can sort the contents alphabetically in reverse order.
~$ ls -lr
total 56
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Videos
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 my
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
-rw-r--r-- 1 ubuntu ubuntu 21 Apr 29 21:23 file1.txtx
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 docs
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop26. Sort contents in reverse order by modification time
To list the contents in reverse order by modification time, pass the -ltr option to ls command.
The latest modified content will come in the last place.
~$ ls -ltr
total 56
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Videos
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 my
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 docs
-rw-r--r-- 1 ubuntu ubuntu 21 Apr 29 21:23 file1.txtx27. Sort contents by Size
To sort the files & directories by Size, you can pass the -S option to ls command. Largest file comes first.
ubuntu@ubuntu:~$ ls -lhS
total 52K
-rw-r--r-- 1 ubuntu ubuntu 8.8K Apr 28 05:18 examples.desktop
drwxr-xr-x 4 ubuntu ubuntu 4.0K Jun 4 23:46 data
drwxr-xr-x 2 ubuntu ubuntu 4.0K Jun 4 05:39 data1
drwxr-xr-x 2 ubuntu ubuntu 4.0K Apr 28 05:33 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4.0K Apr 28 05:25 Documents
drwxr-xr-x 2 ubuntu ubuntu 4.0K Apr 28 05:25 Downloads
drwxr-xr-x 2 ubuntu ubuntu 4.0K Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4.0K Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4.0K Apr 28 05:25 Public28. Sort Files & Directories by modification time
Use the -t option to sort files & directories by modification time. The newest file comes first.
~$ ls -lt
total 56
-rw-r--r-- 1 ubuntu ubuntu 21 Apr 29 21:23 file1.txtx
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 docs
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 29 21:19 my
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 28 06:44 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Videos
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop29. List the newest and oldest file as per its modification time
Here I have listed some contents from which we will filter the latest and oldest file by modification time.
~$ ls -l
total 52
drwxr-xr-x 4 ubuntu ubuntu 4096 Jun 4 05:25 data
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:39 data1
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:33 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Documents
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Downloads
-rw-r--r-- 1 ubuntu ubuntu 8980 Apr 28 05:18 examples.desktop
lrwxrwxrwx 1 ubuntu ubuntu 27 Jun 4 21:59 file1.txt -> /home/ubuntu/data/file1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 Jun 4 22:19 file.txt
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4096 Apr 28 05:25 VideosUse the following command to filter out the latest modified file. For that we need to combine ls with head command.
Note: Head command helps to display the first part of the file.
~$ ls -t | head -1
file.txtUse the following command to filter out the oldest modified file.
~$ ls -t | tail -1
examples.desktop30. Usage of Wildcards with the help of ls command
What is Wildcard?
In simple language, a wildcard is a symbol or a special character.
Due to which we can match the pattern of a word or a string to get our desired output. It helps a lot to save time.
Here are some popular Wildcard Characters :
*– Asterisk[]– Brackets%– Percent?– Question mark!– Exclamation Mark#– Number sign (Hash)-– Hyphen
Let’s take some examples so that your concept becomes clear.
Here I have listed some contents, and with the help of this data, we will try to understand wildcard.
~$ ls
file1.doc file3.doc file5.doc services test1.txt test3.txt test5.txt wgetrc
file2.doc file4.doc rsyslog.conf sysctl.conf test2.txt test4.txt ucf.confEx. # 1 – List those files that start with “fi“
~$ ls fi*
file1.doc file2.doc file3.doc file4.doc file5.docEx. # 2 – List those files whose extension is “.txt“
~$ ls *.txt
test1.txt test2.txt test3.txt test4.txt test5.txtEx. # 3 – Exclude those files from the list whose extension is “.txt“
~/data$ ls -l --hide=*.txt
total 8
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:25 dir1
drwxr-xr-x 2 ubuntu ubuntu 4096 Jun 4 05:25 dir231. List contents by different styled modified date format
Usually, ls command prints the modified date in MM-DD format.
But with the help of --time-style option, we can display the date format of our own choice. In fact you can also choose your time format.
Let’s take an example:
Print the Date in YYYY-MM-DD format and Time in HH:MM format.
~$ ls -lh --time-style="+%Y-%m-%d %H:%M"
total 52K
drwxr-xr-x 4 ubuntu ubuntu 4.0K 2020-06-04 23:46 data
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-06-04 05:39 data1
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:33 Desktop
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Documents
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Downloads
-rw-r--r-- 1 ubuntu ubuntu 8.8K 2020-04-28 05:18 examples.desktop
lrwxrwxrwx 1 ubuntu ubuntu 27 2020-06-04 21:59 file1.txt -> /home/ubuntu/data/file1.txt
-rw-r--r-- 1 ubuntu ubuntu 0 2020-06-04 22:19 file.txt
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Music
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Pictures
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Public
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Templates
drwxr-xr-x 2 ubuntu ubuntu 4.0K 2020-04-28 05:25 Videos32. Sort files by Extension
Run the following command to sort files by Extension.
~$ ls -X -1
rsyslog.conf
sysctl.conf
ucf.conf
file1.doc
file2.doc
file3.doc
file4.doc
file5.doc
test1.txt
test2.txt
test3.txt
test4.txt
test5.txt33. Enable/Disable colors in Output
As you know, Linux uses different colors to display files and directories. Like:
- Blue color – Directory
- White color – File
- Sky Blue color – Symlinks
You can enable/disable the colorized output.
The following command will allow Linux to choose default colors.
~$ ls --color=autoUse the below command to enable colors on output.
~$ ls --color=yesYou can use the following command to disable color on output.
~$ ls --color=neverThe following output contains directories, and as you can see, the Colorized output is disabled.
34. Help/Manual page access
Use the following commands to access the Manual Page/Help Page of ls command.
~$ ls --help~$ man ls35. Check the version of ls command
Check the ls command version using the following command.
~$ ls --version
ls (GNU coreutils) 8.28Infographic
Refer to this Infographic for complete ls command options.
You can visit at following websites to get more information on ls command.
Conclusion
I hope you have learned something from this article and you may have found that ls is a very important command in Linux.
I have tried my best to include all the features of ls command in this guide.
Now I’d like to hear your thoughts.
Was this guide useful to you?
Or maybe you have some queries.
Have I not included any command in this guide?
Leave a comment below.
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