Difference between revisions of "Linux"
From kemiko
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* find . -type f -exec grep -n "LITERAL/REGEX" {} /dev/null \; # search regular files for "LITERAL/REGEX" inside...printing "path/filename:line:content" | * find . -type f -exec grep -n "LITERAL/REGEX" {} /dev/null \; # search regular files for "LITERAL/REGEX" inside...printing "path/filename:line:content" | ||
* find . -type f -exec ls -hlatr {} \; | sort -hk5,5 # long list all files under a directory, sort smallest to largest (human size) | * find . -type f -exec ls -hlatr {} \; | sort -hk5,5 # long list all files under a directory, sort smallest to largest (human size) | ||
| + | * find . -maxdepth 1 -type f # list only regular files in current directory | ||
* rm -rf PATH # remove a "PATH" and all content | * rm -rf PATH # remove a "PATH" and all content | ||
* awk -F'SEPARATOR' '{print $NUMBER}' # print the column "NUMBER" delimited by "SEPARATOR" | * awk -F'SEPARATOR' '{print $NUMBER}' # print the column "NUMBER" delimited by "SEPARATOR" | ||
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* cat FILE | while read LINE; do COMMAND; done # read a file line by line doing a COMMAND until file's end | * cat FILE | while read LINE; do COMMAND; done # read a file line by line doing a COMMAND until file's end | ||
| − | + | * uname -a # lists basic system information | |
| + | * uptime # print time since system boot | ||
| + | * apt-get update # updates the system's package lists | ||
| + | * top # traditional performance monitor | ||
| + | * htop # improved performance monitor | ||
| + | * a2ensite kohlmeyer.us.conf # Apache...enable a virtual host | ||
* ffmpeg -ss 4.5 -i input.mp3 -t 1.7 output.mp3 # cut a mp3 from 4.5 seconds to 6.2 seconds | * ffmpeg -ss 4.5 -i input.mp3 -t 1.7 output.mp3 # cut a mp3 from 4.5 seconds to 6.2 seconds | ||
Revision as of 22:38, 17 November 2016
Favorite Commands:
Some Notation: FILE: a filename DIRECTORY: a directory PATH: a directory/file location LINE: a line's contents COMMAND: a command like awk, cat, echo, grep, etc. LITERAL: a literal/static variable no REGEX REGEX: "REGular EXpression"...a pattern matching expression DATE: a date...format may vary TIME: a time...format may vary NUMBER: a numeric value SEPARATOR: a field separator VARIABLE: a variable /dev/null: a device file representing nothing read: read's stdin
- find . -type f -exec grep -n "LITERAL/REGEX" {} /dev/null \; # search regular files for "LITERAL/REGEX" inside...printing "path/filename:line:content"
- find . -type f -exec ls -hlatr {} \; | sort -hk5,5 # long list all files under a directory, sort smallest to largest (human size)
- find . -maxdepth 1 -type f # list only regular files in current directory
- rm -rf PATH # remove a "PATH" and all content
- awk -F'SEPARATOR' '{print $NUMBER}' # print the column "NUMBER" delimited by "SEPARATOR"
- locate LITERAL # print the PATH of file name matching "LITERAL"
- less -S FILE # page "FILE" with no line wrap
- du -hd1 | sort -h # disk usage (human size),one level deep and sum by directory...pipe to sort smallest to largest
- wget PATH # get "PATH" from http/ftp
- scp PATH1 username@hostname:PATH2 # put "PATH1" to "PATH2"
- scp -r PATH1 username@hostname:PATH2 # same as above, but recursively gets directory and all files under it
- scp username@hostname:PATH1 PATH2 # get "PATH1" to "PATH2"
- scp username@hostname:PATH1 PATH2 # same as above, but recursively gets directory and all files under it
- cat FILE # display contents of "FILE"
- vi FILE # edit/view "FILE"
- echo $VARIABLE # display contents of variable "VARIABLE"
- >FILE # zeros out "FILE"
- cp /dev/null FILE # zeros out "FILE"
- \COMMAND # unalias "COMMAND"
- "COMMAND" # unalias "COMMAND"
- while [ 1 ]; do COMMANDS; sleep NUMBER; done # repeat COMMAND with NUMBER seconds between
- cat FILE | while read LINE; do COMMAND; done # read a file line by line doing a COMMAND until file's end
- uname -a # lists basic system information
- uptime # print time since system boot
- apt-get update # updates the system's package lists
- top # traditional performance monitor
- htop # improved performance monitor
- a2ensite kohlmeyer.us.conf # Apache...enable a virtual host
- ffmpeg -ss 4.5 -i input.mp3 -t 1.7 output.mp3 # cut a mp3 from 4.5 seconds to 6.2 seconds