Search help for the linux commands
Sometimes you need to search what certain linux command does or what arguments the command needs.
There are several ways:
1. Ask coomand itself for help
Usually by adding --h or --help to command.
[root@rifle ~]# ls --help
Usage: ls [OPTION]... [FILE]...
List information about the FILEs (the current directory by default).
Sort entries alphabetically if none of -cftuvSUX nor --sort is specified.
Mandatory arguments to long options are mandatory for short options too.
-a, --all do not ignore entries starting with .
.
.
.
Some commands needs -help parameter.
[root@rifle ~]# zip -h
Copyright (c) 1990-2008 Info-ZIP - Type 'zip "-L"' for software license.
Zip 3.0 (July 5th 2008). Usage:
zip [-options] [-b path] [-t mmddyyyy] [-n suffixes] [zipfile list] [-xi list]
.
.
.
-A, --show-all equivalent to -vET
-b, --number-nonblank number nonempty output lines, overrides -n
2.Using man command
[root@rifle ~]# man ls
3.Using man command --k parameter
[root@rifle ~]# man -k sysctl
_sysctl (2) - read/write system parameters
sysctl (2) - read/write system parameters
sysctl (8) - configure kernel parameters at runtime
sysctl.conf (5) - sysctl preload/configuration file
sysctl.d (5) - Configure kernel parameters at boot
systemd-sysctl (8) - Configure kernel parameters at boot
systemd-sysctl.service (8) - Configure kernel parameters at boot
4. Using apropos or whatis commands
[root@rifle ~]# whatis ls
ls (1) - list directory contents
ls (1p) - list directory contents
No comments:
Post a Comment