(→‎Usage: whatprovides)
 
Line 58: Line 58:
 
{{highlight|lang=text|code=
 
{{highlight|lang=text|code=
 
exclude=cpsc-uml pack* package3
 
exclude=cpsc-uml pack* package3
 +
}}
 +
 +
{{Info
 +
|1=DNF Specific
 +
|2=If you are using {{code|dnf}} such as on CentOS 8, or a recent version of Fedora, you need to add the exclude line in the {{code|/etc/dnf/dnf.conf}} file under the {{code|[main]}} section.
 +
 +
For example:
 +
 +
{{highlight|lang=text|filename=/etc/dnf/dnf.conf|code=
 +
[main]
 +
gpgcheck=1
 +
installonly_limit=3
 +
clean_requirements_on_remove=True
 +
deltarpm=0
 +
 +
exclude=lightdm-webkit2-greeter
 +
}}
 
}}
 
}}
  

Latest revision as of 10:09, 10 October 2019

The Yum package manager has been replaced by DNF.

Usage[edit]

Task Command
Clean and update repository metadata
# yum clean all
# yum update
Install a package by name
# yum install <package>
Remove a package by name
# yum remove <package>
Upgrade a package
# yum update <package>
Search for a package
# yum search <package>
Search for a package by provided file
## To find any package that provides *bin/netcat as a file
# yum whatprovides \*bin/netcat
List installed packages
# rpm -qa
Determine which package provided a file
# rpm -qf <path to file>

Yum repositories are placed in /etc/yum.repos.d. Typically, yum logs will show all actions taken by yum at /var/log/yum.rpm.log.

Excluding Packages[edit]

To exclude a package from being installed, use the -x option or add to the exclude attribute in the /etc/yum.conf file.

The list is separated by a space and supports wildcards. For example:

exclude=cpsc-uml pack* package3
DNF Specific
If you are using dnf such as on CentOS 8, or a recent version of Fedora, you need to add the exclude line in the /etc/dnf/dnf.conf file under the [main] section.

For example:

[main]
gpgcheck=1
installonly_limit=3
clean_requirements_on_remove=True
deltarpm=0

exclude=lightdm-webkit2-greeter

Troubleshooting[edit]

thread.error: can't start new thread[edit]

While attempting to install a package on a VPS, I encountered:

[root@drache ~]# yum install php-mysql
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in ?
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 309, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 178, in main
    result, resultmsgs = base.doCommands()
  File "/usr/share/yum-cli/cli.py", line 345, in doCommands
    self._getTs(needTsRemove)
  File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs
    self._getTsInfo(remove_only)
  File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo
    pkgSack = self.pkgSack
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 661, in 
    pkgSack = property(fget=lambda self: self._getSacks(),
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 501, in _getSacks
    self.repos.populateSack(which=repos)
  File "/usr/lib/python2.4/site-packages/yum/repos.py", line 232, in populateSack
    self.doSetup()
  File "/usr/lib/python2.4/site-packages/yum/repos.py", line 79, in doSetup
    self.ayum.plugins.run('postreposetup')
  File "/usr/lib/python2.4/site-packages/yum/plugins.py", line 179, in run
    func(conduitcls(self, self.base, conf, **kwargs))
  File "/usr/lib/yum-plugins/fastestmirror.py", line 181, in postreposetup_hook
    all_urls = FastestMirror(all_urls).get_mirrorlist()
  File "/usr/lib/yum-plugins/fastestmirror.py", line 333, in get_mirrorlist
    self._poll_mirrors()
  File "/usr/lib/yum-plugins/fastestmirror.py", line 376, in _poll_mirrors
    pollThread.start()
  File "/usr/lib64/python2.4/threading.py", line 416, in start
    _start_new_thread(self.__bootstrap, ())
thread.error: can't start new thread

The solution was to disable the fastest mirror plugin by editing /etc/yum/pluginconf.d/fastestmirror.conf and setting enable=0

[main]
enabled=0
verbose=0
socket_timeout=3
hostfilepath=/var/cache/yum/timedhosts.txt
maxhostfileage=10
maxthreads=15
#exclude=.gov, facebook