Shulou(Shulou.com)06/03 Report--

01. Basic optimization of operating system

1. Operating system character optimization

View the default encoding information:

Echo $LANG

En_US.UTF-8

Temporary modification:

LANG=zh_CN.utf8

Permanent modification:

Vi / etc/locale.conf

LANG= "zh_CN.utf8"

Temporary and permanent changes are made:

Localectl set-locale LANG= "zh_CN.gbk"

two。 System remote connection optimization

Vi / etc/ssh/sshd_config-remote service profile

115 UseDNS no-whether to enable the reverse parsing process of DNS

79 GSSAPIAuthentication no-whether or not GSSAPI certification

Systemctl restart sshd-restart service command

System prompt optimization

Special environment variable: PS1

[\ u@\ h\ W]\ $

[root@backup ~] #

\ u-indicates the user information of logging in to the system

\ h-represents host name information

\ W-display current path information

Temporary modification:

PS1=' [\ u@\ h\ w]\ $'

PS1=' [\ u@\ h\ W\ t]\ $'

Permanent modification:

Vi / etc/profile

PS1=' [\ u@\ h\ W\ t]\ $'

Modify the command prompt color:

PS1=' [\ e [32th 1m] [\ u@\ h\ W\ t]\ $[\ e [0m]'

① ② ③

[\ e [32th 1m]-string information add color numeric information to indicate different color font information is bold

[\ e [0m]-stop subsequent string color modification

02. System information viewing method

System information view

1) use system version information: centos 7.6

Cat / etc/redhat-release

Kernel: view kernel information uname-a

Hardware information query

CPU: view file information cat / proc/cpuinfo

Cpu Information lscpu

Memory: viewing file information cat / proc/meminfo

Memory information free-h

Disk: disk mount file information cat / proc/mounts

Mount information df-h

Load: system load file information cat / proc/loadavg

Load information w

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