RPM: REDHAT PACKAGE MANAGER
rpm: its a low level utility to install/manage/erase packages
rpm -q: to query for a package (installed)
ex: rpm -q openssh
rpm -qa : to query all installed packages
ex: rpm -qa
rpm -qa | grep "ssh"
rpm -q -i - package information
ex: rpm -q -i openssh-server
rpm -q -l -- lists files installed by package
rpm -q -c -- lists only config files installed by package
rpm -q -d -- lists only document files installed by package
How to install a package:
rpm -ivh vsftpd-2.2.2-11.el6.x86_64.rpm
How to remove a package:
rpm -e vsftpd
yum - yellowdog updater modified
yum need repository configuration before using it for installing/updating/query packages.
1. create a file with extention '.repo' in /etc/yum.repos.d
vim /etc/yum.repos.d/hello.repo
[ftprepo]
name=its a ftp repo
baseurl=ftp://192.168.2.1/pub
enabled=1
gpgcheck=0
[cdrepo]
name=its a cd repo
baseurl=file:///media/RHEL6.3
enabled=1
gpgcheck=0
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yum install <packagename> -- to instale specifed package
yum erase <packagename>
yum update <package>
yum list -- lists all packages installed and availabe
#yum list
#yum list | grep -v "myown"
yum info <package> -- gives information about a package
yum info openssh-server
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anlysing and storing logs:
location of log files: /var/log/
Configuration file: /etc/rsyslog.conf
service name :rsyslog
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