Linux system management operation command

View the system, kernel

Cat / etc/redhat-release / / View system uname-r / / View kernel view CPUgrep "CPU" / proc/cpuinfo run time uptime view system digits getconf LONG_BIT view hard disk and partition df-h software install and uninstall yum update / / update system yum makecache software name / update software source cache yum search software name / / search software yum install software Name / / install software yum remove software name / / download the management service software name of the software start / / start service software name restart / / restart service software name stop / / close service software name status / / status file and folder management touch file name / / create file mkdir-p a/b/c/d / / Recursive create folder cp a.a B. B / / copy file mv a.a c.c / / rename or copy (replication in the same folder) chmod 0755 d / / directory permissions modify chown-R user name: user group e / / directory belongs to rm a.bc-rf / / delete file or folder ls / / lists the contents of the current directory cd.. / / return to the previous directory cd ~ / / return to the home directory / rootcd / root/Desktop / / download weget http:// to enter the desktop directory file example: wget https://mirrors.aliyun.com/centos/7.3.1611/isos/x86_64/CentOS-7-x86_64-DVD-1611.torrent Compression and decompression tar zcvf package name .tar.gz / / compressed tar zxvf compressed package name .tar.gz / / unzipped (shown by the unzipped file) tar xzf compressed package name .tar.gz / / unzipped (no file display) shows the current path pwd shutdown and restart init 0 / / shutdown reboot / / restart shutdown-h 20 in root mode / / shut down after 20 minutes shutdown-h 20 $/ / shut down and run in the background after 20 minutes