The Perfect Server - CentOS 4.7 Server - Page 4
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7 Quota
To install quota, we run this command:
yum install quota
Edit /etc/fstab and add ,usrquota,grpquota to the / partition (/dev/VolGroup00/LogVol00):
vi /etc/fstab
# This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/VolGroup00/LogVol00 / ext3 defaults,usrquota,grpquota 1 1 LABEL=/boot /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/hdc /media/cdrecorder auto pamconsole,exec,noauto,managed 0 0 /dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0 |
Then run
touch /aquota.user /aquota.group
chmod 600 /aquota.*
mount -o remount /
quotacheck -avugm
quotaon -avug
to enable quota.
8 Install A Chrooted DNS Server (BIND9)
To install a chrooted BIND9, we do this:
yum install bind-chroot
Then do this:
chmod 755 /var/named/
chmod 775 /var/named/chroot/
chmod 775 /var/named/chroot/var/
chmod 775 /var/named/chroot/var/named/
chmod 775 /var/named/chroot/var/run/
chmod 777 /var/named/chroot/var/run/named/
cd /var/named/chroot/var/named/
ln -s ../../ chroot
chkconfig --levels 235 named on
/etc/init.d/named start
BIND will run in a chroot jail under /var/named/chroot/var/named/. I will use ISPConfig to configure BIND (zones, etc.).
9 MySQL (4.1)
To install MySQL, we do this:
yum install mysql mysql-devel mysql-server
The MySQL init script on CentOS might cause problems when you try to restart MySQL. In some cases it tries to start MySQL before the old MySQL process has stopped which leads to a failure. The solution is to edit the restart section of /etc/init.d/mysqld and add a few seconds delay between the stop and the start of MySQL.
Edit /etc/init.d/mysqld:
vi /etc/init.d/mysqld
and change this section:
[...] restart(){ stop start } [...] |
so that it looks like this:
[...] restart(){ stop sleep 3 start } [...] |
This adds a three second delay between the stop and start of MySQL.
Then we create the system startup links for MySQL (so that MySQL starts automatically whenever the system boots) and start the MySQL server:
chkconfig --levels 235 mysqld on
/etc/init.d/mysqld start
Now check that networking is enabled. Run
netstat -tap | grep mysql
It should show something like this:
[root@server1 ~]# netstat -tap | grep mysql
tcp 0 0 *:mysql *:* LISTEN 3791/mysqld
[root@server1 ~]#
If it does not, edit /etc/my.cnf and comment out the option skip-networking:
vi /etc/my.cnf
[...] #skip-networking [...] |
and restart your MySQL server:
/etc/init.d/mysqld restart
Run
mysqladmin -u root password yourrootsqlpassword
mysqladmin -h server1.example.com -u root password yourrootsqlpassword
to set a password for the user root (otherwise anybody can access your MySQL database!).