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→MySQL
/etc/init.d/httpd restart
/etc/init.d/httpd restart
==Command-Line Quick Reference Guide==
Below is a list of commands that I use all the time & tend to forget.
===Generic Linux===
{| class="wikitable"
|-
! COMMAND NAME !! DESCRIPTION
|-
| df -h || shows disk usage in human readable form
|-
| man <commandname> || shows more info about a command
|-
| uname -a || kernel release version
|-
| /usr/sbin/smbd -V || samba version
|-
| /usr/sbin/httpd -v || apache version
|-
| mysql -v || mysql version
|-
| php -v || php version
|-
| mv || moves or renames a file
|-
| cp || copies or backup a file
|-
| rm || removes or deletes a file
|-
| ps -aux|grep <process> || outputs processes running <process>
|-
| ps -AH || report process status
|-
| top || shows processes
|-
| top -i || shows only active processes
|-
| htop || shows processes (more versatile than top)
|-
| iptraf || shows network info
|-
| mc -d || show midnight commander (cli file browser) to navigate through system easily
|-
| cat /proc/mdstat || shows software raid
|-
| host -t mx aol.com || shows the mx records for aol.com
|-
| net groupmap list || shows samba mappings to nt groups
|-
| telinit 1 || changes to single user mode
|-
| ifconfig || shows detailed info on ethernet ports
|-
| grep -r "casesensitivesearch" * || finds all documents containing the criteria in a dir
|-
| tail -f /var/log/<LOGFILE> || realtime viewing of your log file
|-
| hdparm -Tt /dev/mdx (where x is 0,1,2,etc) || shows software raid performance
|-
| mdadm --detail /dev/mdx (where x is 0,1,2,etc) || gives raid info
|-
| tar -czvf foo.tar.gz foo || creates a tar/zip file of a directory
|-
| tar -xvzf foo.tar.gz || untar/unzip a tar/zip file
|-
| scp -P <ssh_portnumber> foo.tar.gz <user>@<other_server_ipaddress>:/opt || transfers file to another server in /opt directory
|-
| rsync --progress -te "ssh -p <ssh_portnumber>" foo <other_server_ipaddress>:/opt || transfers file to another server
|-
| sed -i s/foo/fee/g <FILENAMEORPATHTODIR> || replaces foo with fee
|}
Estimate file space usage - drill down into directories
cd /
du --si --max-depth 1
cd /home
du --si --max-depth 1
cd /home/e-smith
du --si --max-depth 1
===RPM's===
{| class="wikitable"
|-
! Command !! Explanation
|-
| rpm -qa || shows all rpms installed
|-
| rpm -qa --last || shows all rpms installed & installation date
|-
| rpm -q || asks for rpm info
|-
| rpm -qi || asks for detailed rpm info
|-
| rpm -ql <packagename> || lists all files in a package
|-
| rpm -qf <filename> || reports what package a file belongs to
|}
===YUM'ing and repositories===
{| class="wikitable"
|-
! Command !! Explanation
|-
| yum install <packagename> || installs packagename & any package it may need
|-
| yum remove <packagename> || removes packagename
|-
| yum list updates || list updates to any installed package
|-
| yum list available || list available packages in all repos not already installed
|-
| yum list available |grep <reponame> || list available packages -shows only from repo name
|-
| yum search <packagename> || lists all packages in all repos matching packagename
|-
| yum clean all || Is used to clean up various things which accumulate in the yum cache
|-
| yum --enablerepo=<reponame> <command> || enables a repo not normally enabled
|-
| /sbin/e-smith/audittools/newrpms || shows all extra packages installed
|-
| /sbin/e-smith/audittools/repositories || show all repositories and if they are activated or not
|-
| db yum_repositories show <reponame> || show properties of the repository <reponame> '''(you may use TAB to auto-complete your command line)'''
|}
====Restoring Default Yum Repositories====
{{note box|If you have problems with your yum setup you may have entered incorrect repository values. Remove the current values and restore the original setting with these commands}}
cd /home/e-smith/db/
mv yum_repositories yum_repositories.po
/etc/e-smith/events/actions/initialize-default-databases
Now you have a clean install, you can re-add 3rd party repos as described above
signal-event yum-modify
and check if you can update your server
yum update
==MySQL==
==MySQL==