how to increase the size of disk space /tmp (/usr/tmpDSK) partition in linux server

There may be some of you who have a problem with the partition /tmp is too small while linux server setup. Sometimes this is very annoying because if there is a service that requires /tmp and found the partition /tmp is full so the service can not run normally.  Follows a little info on how to add quota partition /tmp your linux server.

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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