Table of Contents

RHEL/CentOS v.s. Ubuntu Differences (Commands and Configuration)


Table of Contents


Differences

Note RHEL Ubuntu
Support 10years 10years LTS(Long Term Support)
Defautl Editor vi nano
Access control SELinux AppArmor
Apach HTTP Server httpd apache2
Firewall firewalld (CentOS7)
iptables (CentOS5, 6) 		ufw（Uncomplicated FireWall）


Packages

yum vs apt

Note CentOS Ubuntu
Repository configuration file /etc/yum.repos.d/*.repo /etc/apt/sources.list
Repository configuration file /etc/yum.conf /etc/apt/apt.conf （Create）
Proxy Configuration
Acquire::http::Proxy "http://x.x.x.x:8888/";
Package search yum search STRINGS apt search STRINGS
Package search apt list PACKAGE
apt list php
Package Detail yum info PACKAGE apt show PACKAGE
apt show php
Package installation yum install PACKAGE apt install PACKAGE
apt -f install PACAGE ← Repair broken dependencies
Package uninstall yum remove PACKAGE apt purge PACKAGE
List of repositories yum list apt list
Repository update Automatic update every time apt update ← In Ubuntu you need to do
Update installed packages apt-get upgrade

rpm vs dpkg

Note CentOS Ubuntu
Package installation rpm -i PACKAGE.rpm dpkg -i PACKAGE.deb
List of installed packages rpm -qa
rpm -qa |grep xxx 		dpkg -l |grep XXX
dpkg -l |grep ^ii
(Also show deleted packages)
Confirm installed package rpm -q PACKAGE dpkg -l PACKAGE
List of files included in package rpm -ql PACKAGE dpkg -L PACKAGE
Package confirmation including file rpm -qf PACKAGE dpkg -S PACKAGE
Package uninstall rpm -e PACKAGE dpkg -P PACKAGE


Service

Note CentOS6 CentOS7 Ubuntu
Service status check service SERVICE status
/etc/init.d/SERVICE status 		systemctl UNIT status service SERVICE status
/etc/init.d/SERVICE status
Start service service SERVICE start
/etc/init.d/SERVICE start 		systemctl UNIT start service SERVICE start
/etc/init.d/SERVICE start
Stop service service SERVICE stop
/etc/init.d/SERVICE stop 		systemctl UNIT stop service SERVICE stop
/etc/init.d/SERVICE stop
Automatic start setting confirmation chkconfig --list ls -l /etc/rc*.d/
sysv-rc-conf --list
(apt-get install sysv-rc-conf)
Automatic start enable chkconfig SERVICE on systemctl enable UNIT update-rc.d SERVICE enable
Disable auto start chkconfig SERVICE off systemctl enable UNIT update-rc.d SERVICE disable
Auto start service added chkconfig --add SERVICE insserv -d SERVICE
Automatic start service deletion chkconfig --del SERVICE insserv -r SERVICE
Service setting file /etc/sysconfig/SERVICE /etc/default/SERVICE
Individual service
Note CentOS Ubuntu
Apache/httpd /etc/httpd/httpd.conf /etc/apache2/apache2.conf
mysql /etc/my.cnf /etc/mysql/my.cnf
php /etc/php.ini /etc/php5/apache2/php.ini(For the web)
/etc/php5/cli/php.ini(For Command)
/etc/php5/conf.d/*.ini(For the web adn Command)


OS configuration files

Note CentOS Ubuntu
OS Version /etc/redhat-release
/etc/issue
Tips:cat /etc/*release 		/etc/lsb-release
/etc/issue
Tips:cat /etc/*release
Hostname /etc/sysconfig/network /etc/hostname
Network Interfaces /etc/sysconfig/network-scripts/ifcfg-X
Example
/etc/sysconfig/network-scripts/ifcfg-eth0 		/etc/network/interfaces
Defautlt Gateway Configuration /etc/sysconfig/network /etc/network/interfaces
Run Level /etc/inittab
Lang /etc/sysconfig/i18n /etc/default/locale
Modification method
update-locale LANG=ja_JP.UTF-8
Check Locale
locale #Confirm current locale
localectl list-locales #List of available locales
apt install language-pack-ja
Timezone Modification method
dpkg-reconfigure tzdata
Keybord /etc/sysconfig/keyboard /etc/default/keyboard
Modification method
dpkg-reconfigure keyboard-configuration
cron /var/spool/cron/USER /var/spool/cron/crontabs/USER
No difference file
Note CentOS Ubuntu
DNS /etc/resolv.conf /etc/resolv.conf
hosts /etc/hosts /etc/hosts


Log

Note CentOS Ubuntu
syslog /var/log/messages /var/log/syslog
Audit log /var/log/secure /var/log/auth.log
mail log /var/log/maillog /var/log/mail.log
cron log /var/log/cron /var/log/syslog