Useful Linux Commands - Revision history

Timo: /* Getting help */

2024-08-31T12:40:23Z

Getting help

← Older revision		Revision as of 14:40, 31 August 2024
Line 60:		Line 60:

	Probably the easiest text editor. Should be self-explanatory. The symbol ^ is used for the ctrl key and M- stands for alt.		Probably the easiest text editor. Should be self-explanatory. The symbol ^ is used for the ctrl key and M- stands for alt.

	~~joe~~

	~~Another easy text editor. Press Ctrl+C to quit.~~

	vim		vim

Timo at 12:37, 31 August 2024

2024-08-31T12:37:33Z

← Older revision		Revision as of 14:37, 31 August 2024
Line 3:		Line 3:
	First of all, whenever you need to type a longer command or filename, try the <code>TAB</code> key as it will try to complete the name of the command or file you are typing. Pressing <code>TAB</code> twice will show a list of possible completions.		First of all, whenever you need to type a longer command or filename, try the <code>TAB</code> key as it will try to complete the name of the command or file you are typing. Pressing <code>TAB</code> twice will show a list of possible completions.

	A more extensive document on this can be found at https://info-ee.surrey.ac.uk/Teaching/Unix/~~index.html~~.		A more extensive document on this can be found at https://info-ee.surrey.ac.uk/Teaching/Unix/.

	==Basic file managment==		==Basic file managment==

Timo at 12:35, 31 August 2024

2024-08-31T12:35:31Z

← Older revision		Revision as of 14:35, 31 August 2024
Line 3:		Line 3:
	First of all, whenever you need to type a longer command or filename, try the <code>TAB</code> key as it will try to complete the name of the command or file you are typing. Pressing <code>TAB</code> twice will show a list of possible completions.		First of all, whenever you need to type a longer command or filename, try the <code>TAB</code> key as it will try to complete the name of the command or file you are typing. Pressing <code>TAB</code> twice will show a list of possible completions.

	A more extensive document on this can be found at ~~http~~://info.ee.surrey.ac.uk/Teaching/Unix/.		A more extensive document on this can be found at https://info-ee.surrey.ac.uk/Teaching/Unix/index.html.

	==Basic file managment==		==Basic file managment==

Timo: /* Text editors */

2024-08-31T12:32:12Z

Text editors

← Older revision		Revision as of 14:32, 31 August 2024
Line 59:		Line 59:
	nano		nano

	Probably the easiest text editor. Should be self-explanatory.		Probably the easiest text editor. Should be self-explanatory. The symbol ^ is used for the ctrl key and M- stands for alt.

	joe		joe

Bert: /* Utilities */

2019-10-26T00:56:14Z

Utilities

← Older revision		Revision as of 02:56, 26 October 2019
Line 71:		Line 71:
	==Utilities==		==Utilities==

	~~<code>~~df~~</code>~~		df

	Displays info about the free diskspace on the system. df . will give info about the filesystem where the current directory resides. The output becomes a bit more readable with the -h switch.		Displays info about the free diskspace on the system. df . will give info about the filesystem where the current directory resides. The output becomes a bit more readable with the -h switch.

	~~<code>~~du~~</code>~~		du

	Displays info about the diskusage in the current directory (and its subdirectories. A common parameter is -s , equivalent to -summarize , to summarize the disk-usage (without the per-subdir totals).		Displays info about the diskusage in the current directory (and its subdirectories. A common parameter is -s , equivalent to -summarize , to summarize the disk-usage (without the per-subdir totals).

	~~<code>~~quota~~</code>~~		quota

	Displays info about your diskusage, and your disk quota. Quota are limits on diskusage, imposed by the system administrator. The system will warn you if you exceed these limits.		Displays info about your diskusage, and your disk quota. Quota are limits on diskusage, imposed by the system administrator. The system will warn you if you exceed these limits.

	~~<code>~~ps~~</code>~~		ps

	Displays info about processes. Various options possible, for example ps auxf gives info on all processes, including process owner, memory usage, and parent-child indication.		Displays info about processes. Various options possible, for example ps auxf gives info on all processes, including process owner, memory usage, and parent-child indication.

	~~<code>~~htop~~</code>~~		htop

	Displays top CPU processes. Use it to see what gets most cpu power at the moment. Don't leave top open for a long time, since it eats cpu time itself. (quit with 'q').		Displays top CPU processes. Use it to see what gets most cpu power at the moment. Don't leave top open for a long time, since it eats cpu time itself. (quit with 'q').

	[[Category:Shell]]		[[Category:Shell]]

Bert: /* Text editors */

2019-10-26T00:55:45Z

Text editors

← Older revision		Revision as of 02:55, 26 October 2019
Line 57:		Line 57:
	It's easier to use a text editor on a server, than editing your file locally and uploading that file.		It's easier to use a text editor on a server, than editing your file locally and uploading that file.

	~~<code>pico</code> or <code>~~nano~~</code>~~		nano

	Probably the easiest text editor. Should be self-explanatory.		Probably the easiest text editor. Should be self-explanatory.

	~~<code>~~joe~~</code>~~		joe

	Another easy text editor. Press Ctrl+C to quit.		Another easy text editor. Press Ctrl+C to quit.

	~~<code>~~vim~~</code>~~		vim

	Probably the best text editor. Start editing by pressing ~~<code>~~i~~</code>~~. Stop editing by pressing the ~~<code>~~escape~~</code>~~ key. Save and quit with ~~<code>~~:wq~~</code>~~. Quit without saving with ~~<code>~~:q!~~</code>~~.		Probably the best text editor. Start editing by pressing i. Stop editing by pressing the escape key. Save and quit with :wq. Quit without saving with :q!.

	==Utilities==		==Utilities==

Bert: /* Getting help */

2019-10-26T00:55:21Z

Getting help

← Older revision		Revision as of 02:55, 26 October 2019
Line 37:		Line 37:
	==Getting help==		==Getting help==

	~~<code>~~man command-name~~</code>~~		man command-name

	Displays manual pages, if available. E.g. man ls. Use 'q' to exit. Relatives: apropos, help.		Displays manual pages, if available. E.g. man ls. Use 'q' to exit. Relatives: apropos, help.

	~~<code>~~apropos word~~</code>~~		apropos word

	Searches through headers of all man pages.		Searches through headers of all man pages.

	~~<code>~~help command-name~~</code>~~		help command-name

	Displays help about command-name. Only for internal bash-functions.		Displays help about command-name. Only for internal bash-functions.

	~~<code>~~bash~~</code>~~		bash

	The Bourne Again SHell. Widely used successor of sh, the Bourne shell. This is the program you're working under after you open a ssh-session (you don't have to start it to use it). Bash interprets your commands, and executes them. Tab-completion, * and ? expansions, etc are all bash functions. man bash will give you tons of info about it. Alternatives : tcsh, zsh, rc		The Bourne Again SHell. Widely used successor of sh, the Bourne shell. This is the program you're working under after you open a ssh-session (you don't have to start it to use it). Bash interprets your commands, and executes them. Tab-completion, * and ? expansions, etc are all bash functions. man bash will give you tons of info about it. Alternatives : tcsh, zsh, rc

Bert: /* Basic file managment */

2019-10-26T00:54:40Z

Basic file managment

← Older revision		Revision as of 02:54, 26 October 2019
Line 7:		Line 7:
	==Basic file managment==		==Basic file managment==

	~~<code>~~cd directoryname~~</code>~~		cd directoryname

	Change directory. Works the same as under MS-DOS. cd without argument changes to your home directory (like My Documents in windows). Go to the parent directory with <code>cd ..</code>		Change directory. Works the same as under MS-DOS. cd without argument changes to your home directory (like My Documents in windows). Go to the parent directory with <code>cd ..</code>

	~~<code>~~ls~~</code>~~		ls

	List the contents of the current directory. Many different formats are available, a common one is <code>ls -al</code>. To accomodate MS-DOS/Windows users, <code>dir</code> is an alias (synonym) for <code>ls -alF</code>, which gives output similar to the <code>dir</code> command in MS-DOS/Windows.		List the contents of the current directory. Many different formats are available, a common one is <code>ls -al</code>. To accomodate MS-DOS/Windows users, <code>dir</code> is an alias (synonym) for <code>ls -alF</code>, which gives output similar to the <code>dir</code> command in MS-DOS/Windows.

	~~<code>~~cp inputfile targetfile~~</code>~~		cp inputfile targetfile

	Copy inputfile to targetfile. Additional arguments (e.g. -r or -v are explained in the man-page.)		Copy inputfile to targetfile. Additional arguments (e.g. -r or -v are explained in the man-page.)

	~~<code>~~mv inputfile targetfile~~</code>~~		mv inputfile targetfile

	Move inputfile to targetfile. Additional arguments (e.g. -i or -v are explained in the man-page.) This is the way to rename a file. Note that you cannot use a construction like mv .htm .html to add an ``l'' to a bunch of files. A small shell script can provide a way to do this: <code>for i in *.htm; do mv i; done</code>		Move inputfile to targetfile. Additional arguments (e.g. -i or -v are explained in the man-page.) This is the way to rename a file. Note that you cannot use a construction like mv .htm .html to add an ``l'' to a bunch of files. A small shell script can provide a way to do this: <code>for i in *.htm; do mv i; done</code>

	~~<code>~~rm filename~~</code>~~		rm filename

	Remove filename. Additional arguments (e.g. -r or -v are explained in the man-page.) Note: there is no undelete-alike function in most unices.		Remove filename. Additional arguments (e.g. -r or -v are explained in the man-page.) Note: there is no undelete-alike function in most unices.

	~~<code>~~mkdir dirname~~</code>~~		mkdir dirname

	Creates a directory called dirname.		Creates a directory called dirname.

	~~<code>~~rmdir dirname~~</code>~~		rmdir dirname

	Removes an empty directory. Use rm -r to delete a directory and recursively everything in it. Add -f to disable any prompts (dangerous!).		Removes an empty directory. Use rm -r to delete a directory and recursively everything in it. Add -f to disable any prompts (dangerous!).

	==Getting help==		==Getting help==

Bert at 15:22, 28 August 2019

2019-08-28T15:22:55Z

← Older revision		Revision as of 17:22, 28 August 2019
Line 90:		Line 90:

	Displays top CPU processes. Use it to see what gets most cpu power at the moment. Don't leave top open for a long time, since it eats cpu time itself. (quit with 'q').		Displays top CPU processes. Use it to see what gets most cpu power at the moment. Don't leave top open for a long time, since it eats cpu time itself. (quit with 'q').

			[[Category:Shell]]

Robin5210 at 17:27, 12 May 2014

2014-05-12T17:27:17Z

← Older revision		Revision as of 19:27, 12 May 2014
Line 1:		Line 1:
	Once you've connected, you can use these commands to use the ULYSSIS shell.		Once you've connected, you can use these commands to use the ULYSSIS shell.

	First of all, whenever you need to type a longer command or filename, try the TAB key as it will try to complete the name of the command or file you are typing. Pressing TAB twice will show a list of possible completions.		First of all, whenever you need to type a longer command or filename, try the <code>TAB</code> key as it will try to complete the name of the command or file you are typing. Pressing <code>TAB</code> twice will show a list of possible completions.

	A more extensive document on this can be found at http://info.ee.surrey.ac.uk/Teaching/Unix/.		A more extensive document on this can be found at http://info.ee.surrey.ac.uk/Teaching/Unix/.