Unable to open pty: No such file or directory

When you try to enter the vps from the node, it gives the following error 

root@amaziah [~]# vzctl enter VEID
enter into CT VEID failed
Unable to open pty: No such file or directory

To resolve this,

root@amaziah [~]#vzctl exec VEID /sbin/MAKEDEV pty

root@amaziah [~]#vzctl exec VEID /sbin/MAKEDEV tty

root@amaziah [~]#vzctl enter VEID

Now to fix the issue for permanently, in the VPS edit /etc/rc.sysinit

#vi /etc/rc.sysinit

comment the line /sbin/start_udev  and add the following lines bellow that,

/sbin/MAKEDEV tty
/sbin/MAKEDEV pty

Now save the file. Then reboot the VPS.

root@amaziah [~]# vzctl restart VEID

 :)

How to disable mod_security for a domain using .htaccess

To disable mod_security using .htaccess, go to the public_html directory of the desired domain. 

Then edit the .htaccess using your favorite editor. 

#vi .htaccess

And add following lines

<IfModule mod_security.c>

SecFilterEngine Off

SecFilterScanPOST Off

</IfModule>

Save the file.
DONE!!!!

How to reset mysql root password

You can reset the MySQL root password using the following command if know the current root password

root@amaziah [~]#mysqladmin -u root -p 'current password' password 'new password'

If you don't know the  root password then, follow the below steps

First stop MySQL server,

root@amaziah [~]#service mysql stop

                    OR

root@amaziah [~]#/etc/init.d/mysql stop

Then edit the following file,

root@amaziah [~]#vi /etc/rc.d/init.d/mysql

edit the line, 

$bindir/mysqld_safe --datadir=$datadir --pid-file=$server_pid_file $other_args >/dev/null 2>&1 &

To

$bindir/mysqld_safe --skip-grant-tables --datadir=$datadir --pid-file=$server_pid_file $other_args >/dev/null 2>&1 &

Then start the MySQL server,

 root@amaziah [~]#/etc/init.d/mysql start

Once the MySQL server is started, you can login to MySQL as root user without password

root@amaziah [~]#mysql -u root mysql

Then enter the following command to set new password for root,

mysql>UPDATE user SET password=PASSWORD ('new password') WHERE user='root';

mysql>flush privileges ;

mysql>quit

Now you have to stop the MySQL server and edit /etc/rc.d/init.d/mysql and change it to as it was before. ie. change the line 

$bindir/mysqld_safe --skip-grant-tables --datadir=$datadir --pid-file=$server_pid_file $other_args >/dev/null 2>&1 &

To

$bindir/mysqld_safe --datadir=$datadir --pid-file=$server_pid_file $other_args >/dev/null 2>&1 &

Once this has been done, start the MySQL server.

root@amaziah [~]#/etc/init.d/mysql start

Done. Now you can login to MySQL using the new password that you have set.  

error : To add, edit, or remove IPs, please contact your server administrator

When you add ip from WHM "Add new IP Address"  you may get the following message

To add, edit, or remove IPs, please contact your server administrator.

To fix this issue, go to backend and add the ip to the file /etc/ips in the format "ip:netmask:broadcast" as shown below.

# vi /etc/ips

192.168.1.244:255.255.255.255:192.168.1.255

Then,

Restart the ipalias service

# /etc/init.d/ipaliases restart

Bringing up venet0:0:cp1                                   [  OK  ]

Routing 192.168.1.244                                     [  OK  ]

Now if it is an openvz vps, then edit the following file

#vi /etc/vz/conf/VzID.conf

#vzctl restart VzID

That's all
We have done it!!!!