Linux Commands Shutting Down, Re-Mounting, yum command

System Shut Down

Shutting Down

shutdown -h now
shutdown -h +15

Shut Down > Halt now or in 15 minutes.

shutdown -r now
shutdown -r +15

Shut Down > Restart now or in 15 minutes.

Re-mounting Drives

the root/boot drive

mount -o remount,rw /

YUM CentOSPlus repository


nano /etc/yum.repos.d/CentOS-Base.repo

#additional packages that extend functionality of existing packages


or just type:
# yum update --enablerepo centosplus mysql-server mysql

Installing LAMP Services:


yum list available
yum install packagename
yum update packagename
yum check-update
yum search packagename

Upgrading LAMP Services:


yum update
yum update httpd
yum update openssl
yum update mysql-server mysql
yum update php

Starting and Restarting Services:


/etc/init.d/sshd start
/etc/init.d/httpd start
/etc/init.d/httpd restart
/etc/rc.d/init.d/mysqld start
# service httpd start
# service httpd stop
# service httpd reload

/etc/rc.d/init.d/mysqld start /etc/rc.d/init.d/mysqld stop /etc/rc.d/init.d/mysqld restart

Listing, Enabling, Disabling Services:


# chkconfig --list httpd

# chkconfig --level 3 httpd on

# chkconfig --level 3 httpd off

reset to default configuration: # chkconfig --level 3 httpd reset

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