Command for optimizing system Foundation and viewing system Information
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
