Getting started with the shell-system and user profiles

Variables are divided into system variables and user-defined variables, and their profiles are of course divided into system environment variable configuration file and user environment variable control file.

1. Specify the configuration file for the environment variable

[Email protected] 111]# Vim/etc/profile

We recommend that you create a *.sh file under/ETC/PROFILE.D to modify

2. Variables in the configuration file that modify the global parameters

[Email protected] 111]# vim/etc/profile.d/path.sh

#!/bin/bash

Export path= $PATH:/tmp/:/date/bin/
~
~

: Wq

[[email protected] 111]# source/etc/profile//Reset Effective

[[email protected] 111]# echo $PATH view

3. Modify the system's bash system configuration file

The location of the directory is

[Email protected] 111]# VIM/ETC/BASHRC

Modify the PS1 variable inside the BASHRC

[Email protected] 111]# echo $PS 1
[\[email protected]\h \w]\$
[[email protected] 111]# ps1= ' [\[email protected]\h\t \w]\$ '
[[Email protected]:51:02/111]#

Change back is to change ' t ' W ' to ' W '

[Email protected]:51:02/111]# ps1= ' [\[email protected]\h \w]\$ '
[Email protected] 111]# echo $PS 1
[\[email protected]\h \w]\$

Change the Umask value

[Email protected] 111]# vim/etc/profile.d/umask.sh

umask 0012

~
~

: Wq

[Email protected] 111]# Source/etc/profile

[Email protected] 111]# umask
0012

And then change back to 0022 as above, reset takes effect. View Umask

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The user modifies the environment variable profile to switch to that user and then modifies

Switch users first

[[Email protected] 111]# CD
[Email protected] ~]# ls-a.

. bash_profile

User-defined environment variables

. BASHRC

User-defined aliases

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Summary: vim/etc/profile.d/**.sh variables that modify global parameters Source/etc/profile variable restart takes effect

User variable switch to user under Modify

Getting started with the shell-system and user profiles