Package management apt, dpkg

apt

View installed apps

apt list --installed

 accountsservice/focal-updates,focal-security,now 0.6.55-0ubuntu12~20.04.5 amd64 [installed,automatic] With this explanation

/ Followed by the name of cruelty focal-updates,focal-security

now 0.6.55-0ubuntu12~20.04.5 Version number

amd64 CPU Architecture name

installed,automatic Indicates that... Is installed , And automatically installed , Some have upgradable Indicates that it can be upgraded

Check the relevant information of an application accurately , Such as apt

grep Filter command , It's worth choosing Beginning with apt The message redirects the result （>） Put it in the file , Last cat View file information

Find and install apps

Before installation apt uodate Command to update the local software source copy , Reduce search time , Reduce pressure on the server

look for git Software , Among them, regular exact matching , start , The ending is git Software for ：

  Install application , Some dependencies will be installed , Will ask if yes/no, If you want to omit adding -y Parameters , Default answer yes：

Because I have installed , You will be prompted that it has been installed

Update upgrade package  

sudo apt update
apt list --upgradable  List the packages that can be upgraded 
apt upgrade  Package name 

 

Delete package

apt remove  Package name 

dpkg

Is the latest version of the installation package , But the latest version has not been released , So use this manual installation

other

Other tools such as homebrew,snap,flatpak etc.