Linux CentOS7 Cloud Computing Advanced Operation and maintenance Phase 1 2

Basic command operation

Terminal:

View the current virtual terminal: tty

Switch console terminal: ctrl+alt+F1~F6

Enlarge font: ctrl shift +

Reduced font: ctrl-

Open a terminal: ctrl shift n:

Timing shutdown: shutdown-h time

Shutdown after n minutes: shutdown + time

Cancel shutdown: shutdown-c

Shell:

Distinguish between internal and external commands: type command

Switch to XXX user: su-XXX

View all shell types: cat / etc/shells

Alias:

Local temporary alias: alias vimens33='vim / etc/sysconfig/network-scripts/ifcfg-ens33'

Local permanent alias: vim / root/.bashrc,alias vimens33='vim / etc/sysconfig/network-scripts/ifcfg-ens33',source / root/.bashrc

Global permanent alias: vim / etc/bashrc,alias vimens33='vim / etc/sysconfig/network-scripts/ifcfg-ens33'

System time:

Test the time it takes for a command to run: the time command, the actual time used by real, the time used by user user state, the time used by sys kernel state

Help:

View help information for commands: man command, command-- help

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Original link: https://blog.csdn.net/maergaiyun/article/details/103943351