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Linux yum command how to use, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain for you in detail, people with this need can come to learn, I hope you can gain something.

1. Make a list of all updatable software

Command: yum check-update

two。 Install all updated softwar

Command: yum update

3. Install only the specified software

Command: yum install

4. Update only the specified software

Command: yum update

5. Make a list of all installable software

Command: yum list

Install and delete software with YUM

It is common to install system add and remove software, and yum is also competent for this task, as long as the software is installed by rpm.

The installation command is that yum install xxx,yum will query the database to see if there is a software package, if so, check its dependency conflict relationship, if there is no dependency conflict, then it is best to download and install; if so, it will give a prompt to ask whether you want to install the dependency at the same time, or delete the conflicting package, and you can make your own judgment.

The delete command is yum remove xxx, and just like the installation, yum queries the database and gives tips for resolving dependencies.

1. Install the software package with YUM

Command: yum install

two。 Delete a software package with YUM

Command: yum remove

Use YUM to query software information

We often encounter such a situation, want to install a software, only know that it is related to some aspect, but do not know its name. At this point, the query function of yum works. You can use commands such as yum search keyword to search, for example, we want to install an Instant Messenger, but do not know which, then you might as well use the command yum search messenger to search, yum will search the description of all available rpm, list all the description of rpm packages related to messeger, so we may get gaim,kopete and so on, and choose from.

Sometimes we come across the installation of a package, but do not know its purpose, we can use the yum info packagename instruction to get information.

1. Use YUM to find software packages

Command: yum search

two。 List all installable software packages

Command: yum list

3. List all updatable software packages

Command: yum list updates

4. List all installed packages

Command: yum list installed

5. List all packages that are installed but not within Yum Repository

Command: yum list extras

6. List the specified software packages

Command: yum list

7. Use YUM to get package information

Command: yum info

8. List information for all software packages

Command: yum info

9. List all updatable package information

Command: yum info updates

10. List all installed package information

Command: yum info installed

11. List all software packages installed but not within Yum Repository

Command: yum info extras

twelve。 List the files provided by the software package

Command: yum provides

Clear the YUM cache

Yum stores downloaded packages and header in cache instead of automatically deleting them. If we think they take up disk space, we can use the yum clean instruction to clear them. More accurately, we can use yum clean headers to clear header,yum clean packages, clear downloaded rpm packages, and yum clean all.

1. Clear the software packages under the cache directory (/ var/cache/yum)

Command: yum clean packages

two。 Clear the headers under the cache directory (/ var/cache/yum)

Command: yum clean headers

3. Clear the old headers under the cache directory (/ var/cache/yum)

Command: yum clean oldheaders

4. Clear the software packages under the cache directory (/ var/cache/yum) and the old headers

Command: yum clean, yum clean all (= yum clean packages; yum clean oldheaders)

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