ohazot_command_line

       _                    _
  ___ | |__   __ _ _______ | |_
 / _ \| '_ \ / _` |_  / _ \| __|
| (_) | | | | (_| |/ / (_) | |_
 \___/|_| |_|\__,_/___\___/ \__|

command_line_intro — basic commands

FILES

Action	Command
Move file or directory	: `mv SOURCE TARGET`
Copy file	: `cp SOURCE TARGET`
Copy direcotry	: `cp -r SOURCE TARGET`
Remove file	: `rm FILENAME`
Remove directory	: `rm -r DIRECTORY`

The flag -R/-r applies to different commands to execute recursive actions.

FILE CONTENTS

head	: Get the first 10 lines of a file	: `head FILENAME`
head -15	: Get the first 15 lines of a file	: `head -15 FILENAME`
tail	: Get the last 10 lines of a file	: `tail FILENAME`
tail -15	: Get the last 15 lines of a file	: `tail -15 FILENAME`
tail -f	: Get the latest lines of a file continuously	: `tail -f FILENAME`

grep

Get lines matching pattern	: `grep PATTERN FILE(S)`
Get lines not matching pattern	: `grep -v PATTERN FILE(S)`
Get file names not matching pattern	: `grep -L PATTERN FILE(S)`
Get line numbers matching pattern	: `grep -n PATTERN FILE(S)`
Perform a case-insensitive search for pattern	: `grep -i PATTERN FILE(S)`
Perform a recursive search	: `grep -R PATTERN DIRECTORY`

NETWORK

Get network information using ifconfig (part of the package net-tools which may need to be installed) or ip.

sudo ifconfig -a

sudo ip add

PIPES

Command output can be redirected to other commands using | .

xargs

-n	: Maximum number of arguments.
-0	: User NUL as separator instead of the default space and newlines.

$ echo -e "1\n2\n3" | xargs -n1 echo
1
2
3
$ echo -e "1\n2\n3" | xargs echo
1 2 3
$ echo -e "1\n2\n3" | xargs -0 echo
1
2
3

$ echo "1 2 3" | xargs echo
1 2 3
$ echo "1 2 3" | xargs -n1 echo
1
2
3

AUTHORS

ohazot | about | ohazot.com <admin@ohazot.com>