Saturday, September 21, 2013

Add more space to /tmp in cPanel server.

The following could help you to increase more space in /tmp.

You need to make alternation in the file /scripts/securetmp

#vi /scripts/securetmp

Find the entry my $tmpdsksize under Global Variables as follows:
# Global Variables
my $tmpdsksize = 512000; # Must be larger than 250000

Change the value for that particular entry to desired size.

Then make sure that no processes are using /tmp using the command, lsof /tmp

Please stop the service /etc/init.d/mysql stop. Also delete the file, /usr/tmpDSK if it exists by rm -rf /usr/tmpDSK

Then

umount /tmp

Run the script

#/scripts/securetmp

Then you will asked for some confirmation steps.

“Would you like to secure /tmp at boot time?” Press y

“Would you like to secure /tmp now?” Press y

Eventually you can see the upgraded space to /tmp in server :)

 

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1.) Stop MySql service and process kill the tailwatchd process.

[root@server ~]# /etc/init.d/mysqld stop
Stopping MySQL: [ OK ]
[root@server ~]# pstree -p | grep tailwatchd
Find the tailwatchd process id and kill it
[root@server ~]# kill -9 2522
2.) Take a backup of /tmp as /tmp.bak

[root@server ~]#cp -prf /tmp /tmp.bak
3.) Create a 2GB file in the avaliable freespace

[root@server ~]# dd if=/dev/zero of=/usr/tmpDSK bs=1024k count=2048
2048Ʈ records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 73.6908 seconds, 29.1 MB/s
[root@server~]# du -sch /usr/tmpDSK
2.1G /usr/tmpDSK
2.1G total
4.) Assign ext3 filesystem to the file

[root@server~]# mkfs -t ext3 /usr/tmpDSK
mke2fs 1.39 (29-May񮖦)
/usr/tmpDSK is not a block special device.
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
262144 inodes, 524288 blocks
26214 blocks (5.00%) reserved for the super user
First data block=0
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 25 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
5.) Check the file system type:-

[root@server ~]# file /usr/tmpDSK
/usr/tmpDSK: Linux rev 1.0 ext3 filesystem data (large files)
Note:-

You may also use the following comands for making ext3 file system on a file:

[root@server ~]# mkfs.ext3 /usr/tmpDSK
[root@server ~]# mke2fs /usr/tmpDSK
6.) Unmount /tmp partition

[root@server ~]# umount /tmp
7.) Mount the new /tmp filesystem with noexec

[root@server ~]# mount -o loop,noexec,nosuid,rw /usr/tmpDSK /tmp
8.) Set the correct permission for /tmp

[root@server ~]# install -d –mode=1777 /tmp
[root@antg ~]# ls -ld /tmp
drwxrwxrwt 3 root root 4096 Feb 6 08:42 /tmp
( you may use the command chmod 1777 /tmp for doing the same )

[root@server ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda9 28G 6.4G 20G 25% /
/dev/sda8 99M 10M 84M 11% /boot
tmpfs 500M 0 500M 0% /dev/shm
/usr/tmpDSK 2.0G 68M 1.9G 4% /tmp
9.)Restore the content of old /tmp.bkp directory

[root@server ~]# cp -rpf /tmp.bak/* /tmp
10.) Restart the mysql and tailwathchd services.

[root@server ~]# /etc/init.d/mysql start
[root@server ~]# /scripts/restartsrv_tailwatchd
11.)Edit the fstab and replace /tmp entry line with :-

/usr/tmpDSK /tmp ext3 loop,noexec,nosuid,rw 0 0
12.) Mount all filesystems

[root@server~]# mount -a
Check it now:-

[root@server ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda9 28G 6.4G 20G 25% /
/dev/sda8 ɃM 10M 84M 11% /boot
tmpfs 500M 0 500M 0% /dev/shm
/usr/tmpDSK 2.0G 68M 1.9G 4% /tmp

really hope this little tutoral can help you:)

 

 

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