.Dd Created:2026-03-27|Updated:2026-03-27|
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.de obdl
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.de obc2
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.de obc3
.obc option arguments description
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.de am
.opsy Archlinux manpages:
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.de om
.opsy OpenBSD manpages:
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.Dt COMMAND_LINE_INTRO oh
.Os linux , OpenBSD 7.8 |
.Nm command_line_intro 
.Nd basic commands
.Sh FILES
.obc2
.It Sy Action Ta Sy Command
.It Move file or directory Ta : Li mv SOURCE TARGET
.It Copy file Ta : Li cp SOURCE TARGET
.It Copy direcotry Ta : Li cp -r SOURCE TARGET
.It Remove file Ta : Li rm FILENAME
.It Remove directory Ta : Li rm -r DIRECTORY
.El
The flag -R/-r applies to different commands to execute recursive actions.
.Sh FILE CONTENTS
.obc3
.It head Ta : Get the first 10 lines of a file Ta : Li head FILENAME
.It head -15 Ta : Get the first 15 lines of a file Ta : Li head -15 FILENAME
.It tail Ta : Get the last 10 lines of a file Ta : Li tail FILENAME
.It tail -15 Ta : Get the last 15 lines of a file Ta : Li tail -15 FILENAME
.It tail -f Ta : Get the latest lines of a file continuously Ta : Li  tail -f FILENAME
.El
.Ss grep
.obc2
.It Get lines matching pattern Ta : Li grep PATTERN FILE(S)
.It Get lines not matching pattern Ta : Li grep -v PATTERN FILE(S)
.It Get file names not matching pattern Ta : Li grep -L PATTERN FILE(S)
.It Get line numbers matching pattern Ta : Li grep -n PATTERN FILE(S)
.It Perform a case-insensitive search for pattern Ta : Li grep -i PATTERN FILE(S)
.It Perform a recursive search Ta : Li grep -R PATTERN DIRECTORY
.Sh NETWORK
Get network information using ifconfig (part of the package net-tools which may need to be installed) or ip.
.Dl sudo ifconfig -a
.Dl sudo ip add
.Sh PIPES
Command output can be redirected to other commands using | .
.Ss xargs
.obc2
.It -n Ta : Maximum number of arguments.
.It -0 Ta : User NUL as separator instead of the default space and newlines.
.El
.obdl $ echo -e \&"1\en2\en3\&" | xargs -n1 echo
1
2
3
$ echo -e "1\en2\en3" | xargs echo
1 2 3
$ echo -e "1\en2\en3" | 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
.Ed
.Sh SEE ALSO
.oxr text_manipulation oh
.Xr linux oh
.am .oxr mv 1
.oxr cp 1
.oxr rm 1
.oxr tail 1
.oxr head 1
.oxr ifconfig 8
.oxr ip 8
.oxr xargs 1
.Xr grep 1
.Sh AUTHORS
.An -nosplit
.Xr ohazot oh |
.Xr about oh |
.Lk https://ohazot.com ohazot.com
.Aq Mt admin@ohazot.com