Useful Linux commands: Difference between revisions

Revision as of 00:24, 23 March 2025

The one-stop shop for all your Linux command needs. Most commands listed will work on our machines, though that can vary based on installed packages and/or operating systems.

File and Directory Management

ls

Lists all files and directories

ls -a - List all files, including hidden ones like .ssh, .bashrc, and so on.
ls -l - Include extra file information like permissions, owner, groups, modified date, and more.
ls -s - List size of files in blocks.
ls -S - List by size, largest first.

cd

Used to change the directory.

cd - When no path is specified, you will move to the user's home directory. As root, you will move to /root/. As your user, you will move to /eccs/home/<username>/.
cd /path/to/file - When changing directories, if you're not in the immediate parent directory, you need to specify the full path. For example, if my current working directory is /etc, I can cd jupyterhub since it's within /etc. However, if my current working directory is /bin, I would have to specify the full path for /etc/jupyterhub.

@@ Line 1: / Line 1: @@
-This page will contain some useful Linux commands.
+The one-stop shop for all your Linux command needs. Most commands listed will work on our machines, though that can vary based on installed packages and/or operating systems.
-/Linux world directory is a special type of file that contains a list of objects (files or other directories). Folder and directory are interchangeable terms.
+== File and Directory Management ==
-Directories are organized in a tree structure. /.
+=== ls ===
+Lists all files and directories
+* <code>ls -a</code> - List all files, including hidden ones like .ssh, .bashrc, and so on.
+* <code>ls -l</code> - Include extra file information like permissions, owner, groups, modified date, and more.
+* <code>ls -s</code> - List size of files in blocks.
+* <code>ls -S</code> - List by size, largest first.
+=== cd ===
-Some useful arguments:
+Used to change the directory.
-*	ls -l displays the permissions, user and group ownership, and date of creation in addition to displaying the contents.
+* <code>cd</code> - When no path is specified, you will move to the user's home directory. As root, you will move to <code>/root/</code>. As your user, you will move to <code>/eccs/home/<username>/</code>.
-*	<filename> - if a filename starts with dot, then it is not visible). ls -a shows you hidden files too.
+* <code>cd /path/to/file</code> - When changing directories, if you're not in the immediate parent directory, you need to specify the full path. For example, if my current working directory is <code>/etc</code>, I can <code>cd jupyterhub</code> since it's within <code>/etc</code>. However, if my current working directory is <code>/bin</code>, I would have to specify the full path for <code>/etc/jupyterhub</code>.
-cd - no path is provided, then it brings you to the previous working directory.
-you to the parent directory of your current working directory.
-*	cd ~  - your home directory
-*	cd / - here the path is / so it brings you to the root directory.
-the full path of your current working directory
-cp <source_file_path> <target_file_path> (copy)- make a copy of a file. (use -r option for folders)
-vi/nano/.
-directory
-/directory
-/directory
-to stdout
-the user
-apt/
-/time
-mount, df, ps(pstree), awk, sed, head, tail, ln, alias, scp, ssh, wget, find, which, locate, chown, man, tar, ifconfig, ping
-Piping('|')
-Keyboard Shortcuts:
-Tab - autofill the file or directory name currently being typed
-Up/down arrows - go through the history of commands you have typed
-Ctrl + C - end the command that is currently being executed (useful for getting out of a place where it keeps asking you to enter something and you don't want to)
-Tested and working 2022

Useful Linux commands: Difference between revisions

Revision as of 00:24, 23 March 2025

File and Directory Management

ls

cd

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