Usage of APT in Ubuntu and comparison with yum

Fedora and Red Hat have Yum installation software and Ubuntu has apt tool.

APT is simply a command to install software for Ubuntu.

1. APT Related Files

/Etc/APT/sources. List	Set the source for obtaining the Software Package
/Etc/APT/apt. conf	APT configuration file
/Etc/APT/apt. conf. d/	APT's fragmented configuration file
/Etc/APT/preferences	Version Parameters
/Var/Cache/APT/archives/	Store downloaded software packages
/Var/Cache/APT/archives/partial	Store the software package being downloaded
/Var/lib/APT/lists/	Store downloaded software package details
/Var/lib/APT/lists/partial/	Store the details of the software package being downloaded

Ii. subcommands of the apt-GET command

Update	Update the package list
Upgrade	Upgrade all software packages in the system
Install	Install software package
Remove	Uninstall Software Package
Autoremove	Only remove software packages that do not need to be downloaded again
Purge	Permanently delete the software package (including configuration files)
Source	Download source code
Build-Dep	Automatically download, install, and compile the required software package
Dist-Upgrade	Upgrade the entire release
Dselect-Upgrade	Select to install dselect for upgrade
Clean	Delete all updates cached locally
Autoclean	Delete unnecessary software packages in the local cache
Check	Check for problematic Dependencies
Example: $ sudo apt-Get install php5-mysql apache2 $ Sudo apt-Get Update & sudo apt-Get upgrade

Iii. APT-Get Command Options

-D, -- download-only	Download only, not install
-F, -- fix-broken	Fix dependency issues (for the install and remove sub-commands)
-M, -- ignore-missing, -- fix-Missing	Ignore missing software packages. When a software package cannot be downloaded, it is automatically ignored.
-- No-Download	Download of software packages is prohibited. With-M, APT can only use the downloaded software package.
-Q, -- quiet	Silent mode. The output information is suitable for logs.
-S, -- simulate, -- just-print	Simulate the test and do not perform the actual operation or change the system.
-Y, -- yes, -- assume-Yes	Yes automatically when the system asks a question
-U, -- show-upgraded	Show upgraded software packages
-V, -- verbose-versions	Displays the complete version number of installed and upgraded software packages.
-B, -- compile, -- Build	Compile the source code package after it is downloaded.
-- Ignore-hold	Ignore reserved software packages
-- No-Upgrade	Do not upgrade the Software Package
-- Force-Yes	Force answer yes
-- Print-Uris	Only accept the package address, not install
-- Purge	Thoroughly Delete, including configuration files
-- Reinstall	Reinstall the Software Package

4. APT-Cache command

Function: search for a software package name or display details of a software package.
Search for MySQL software packages	$ Apt-cache search MySQL
View the detailed version number of the SSH Software Package	$ Apt-Cache show SSH

V. Operation comparison of Red Hat, fedora, and Ubuntu software packages

Task	Red Hat, Fedora	Ubuntu
Basic Information
Package suffix	*. Rpm	*. Deb
Software source configuration file	/Etc/yum. conf	/Etc/APT/sources. List
Install, delete, and upgrade software packages
Update the package list	Automatic execution every time yum is run	Apt-Get update
Install software from software warehouse	Yum install package	Apt-Get install package
Install a downloaded software package	Yum install PKG. rpm Rpm-I PKG. rpm	Dpkg-I PKG. Deb PKG -- install PKG. Deb
Delete a software package	Rpm-e package	Apt-Get remove package
Software Package upgrade check/test	Yum check-Update	Apt-get-s upgrade Apt-get-s dist-Upgrade
Upgrade Software Package	Yum update Rpm-uvh [ARGs]	Apt-Get upgrade
Upgrade the entire system	Yum upgrade	Apt-Get dist-Upgrade
Software Package Information
Obtains information about a software package.	Yum search package	Apt-Cache show package
Obtain information about all software packages	Yum list available	Apt-Cache dumpavail
Show all installed software	Yum List Installed Rpm-Qa	Dpkg-l Dpkg -- list
Obtains information about an installed software package.	Yum info package Rpm-Qi package	Dpkg -- status package
List the files contained in an installed software package	Rpm-QL package
List documents contained in an installed software package	Rpm-Qd package	None
List the configuration files contained in an installed software package	Rpm-QC package	None
Displays the list of packages that a software package depends on.	Rpm-QR package	Apt-Cache depends package
Displays the reverse dependency of a software package.	Rpm-Q-whatrequires [ARGs]	Apt-Cache rdepends package
Package File Information
Obtains information about a software package.	Rpm-qpi pkg. rpm	Dpkg -- info PKG. Deb
Obtains the list of files contained in a software package.	Rpm-qpl PKG. rpm	Dpkg -- contents PKG. Deb
Obtain the documents contained in a software package file	Rpm-qpd PKG. rpm	None
Obtains the configuration file contained in a software package file.	Rpm-qpc PKG. rpm	None
Decompress the Software Package	Rpm2cpio PKG. RPM | cpio-vid	Dpkg-Deb -- extract PKG. Deb
Search which software package is used to install a file.	Rpm-qf/file/Name	Dpkg-S/file/Name Dpkg -- search/file/Name
Search for all software packages that provide a file	Yum provides/file/Name	Apt-file search/file/Name
Miscellaneous
Displays the cache status of local software packages.	None	Apt-Cache stats
Verify all installed software packages	Rpm-va	Debsums
Delete all locally cached software packages	Yum clean packages	Apt-Get clean
Only remove outdated software packages in the local cache	None	Apt-Get autoclean
Delete all software package information	Yum clean Headers	Apt-file purge

Usage of APT in Ubuntu and comparison with yum