linux software operation

operating	command
ubuntu
Source operation
Source Configuration	https://www.cnblogs.com/wenlin-gk/p/11146228.html
Source Update	sudo apt-get update
View information source packages	apt-cache madison pkg view the available versions of apt-cache show package to view detailed information package apt-cache depends package is understood to use dependent apt-cache rdepends package is the package to see what packages are dependent on
Package Operations
increase	sudo apt-get install package=version --reinstall
delete	sudo apt remove package --purge also delete profiles
batch deletion	sudo apt-get clean && sudo apt-get autoclean clean up unwanted package
modify
Repair / Uninstall	sudo apt-get --fix-missing install
upgrade	sudo apt-get upgrade
Degraded version of 2-> 1	apt install pkg dependent-pkg = 1 (already exists pkg = 2, downgrade to 1)
View	apt list --installeddpkg -l | grep pkg_name
View verification	sudo apt-get check check dependency of damage
CentOS
Source / bag operation	/etc/yum.repos.d/xxx.repo 查看源中的软件版本 yum --showduplicates list docker | expand yum autoremove yum list installed | grep docker yum install -y docker-engine-1.12.6 yum remove -y docker-engine-1.12.6 docker-engine-selinux-1.12.6 yum erase -y docker-engine