Linux Commands - Part 1
This is a linux command line reference for common operations (part 1).
Examples marked with • are valid/safe to paste without modification into a terminal, so
you may want to keep a terminal window open while reading this so you can cut & paste.
All these commands have been tested both on Fedora and Ubuntu.
Linux Commands - part 1
Command
Description
•
apropos whatis
Show commands pertinent to string. See also threadsafe
•
man -t man | ps2pdf - > man.pdf
make a pdf of a manual page
which command
Show full path name of command
time command
See how long a command takes
•
time cat
See how long a command takes
•
nice info
Run a low priority command (The "info" reader in this case)
•
renice 19 -p $$
Make shell (script) low priority. Use for non interactive tasks
dir navigation
•
cd -
Go to previous directory
•
cd
Go to $HOME directory
(cd dir && command)
Go to dir, execute command and return to current dir
•
pushd .
Put current dir on stack so you can popd back to it
file searching
•
alias l='ls -l --color=auto'
quick dir listing
•
ls -lrt
List files by date. See also newest and find_mm_yyyy
•
ls /usr/bin | pr -T9 -W$COLUMNS
Print in 9 columns to width of terminal
find -name '*.[ch]' | xargs grep -E 'expr'
Search 'expr' in this dir and below. See also findrepo
find -type f -print0 | xargs -r0 grep -F 'example'
Search all regular files for 'example' in this dir and below
find -maxdepth 1 -type f | xargs grep -F 'example'
Search all regular files for 'example' in this dir
find -maxdepth 1 -type d | while read dir; do echo $dir; echo cmd2; done
Process each item with multiple commands (in while loop)
•
find -type f ! -perm -444
Find files not readable by all (useful for web site)
•
find -type d ! -perm -111
Find dirs not accessible by all (useful for web site)
•
locate -r 'file[^/]*\.txt'
Search cached index for names. This re is like glob *file*.txt
•
look reference
Quickly search (sorted) dictionary for prefix
•
grep --color reference /usr/share/dict/words
Highlight occurances of regular expression in dictionary
Sursa2009-02-21 15:59:28
