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Increase the size of /tmp (/usr/tmpDSK) partition in Linux?

Sat, 04/10/2010 - 23:06 |

donie

How to increase the size of /tmp partition in Linux?
Proceed with the given steps:-
========================
1) Stop httpd and mysqld service and process kill the tailwatchd process (CPanel uses this).

[root@antg ~]# /etc/init.d/mysqld stop

Stopping MySQL: [ OK ]

[root@antg ~]# /etc/init.d/httpd stop

Stopping httpd: [ OK ]

[root@antg ~]# pstree -p | grep tailwatchd

Find the tailwatchd process id and kill it

[root@antg ~]# kill -9 2522

2) Take a backup of /tmp as /tmp.bak

[root@localhost ~]#cp -prf /tmp /tmp.bak

3) Create a 2GB file in the avaliable freespace

[root@antg ~]# dd if=/dev/zero of=/usr/tmpDSK bs=1024k count=2048

2048+0 records in

2048+0 records out

2147483648 bytes (2.1 GB) copied, 73.6908 seconds, 29.1 MB/s

[root@antg ~]# du -sch /usr/tmpDSK

2.1G /usr/tmpDSK

2.1G total

4) Assign ext3 filesystem to the file

[root@antg ~]# mkfs -t ext3 /usr/tmpDSK

mke2fs 1.39 (29-May-2006)

/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@antg ~]# 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@antg ~]# mkfs.ext3 /usr/tmpDSK

[root@antg ~]# mke2fs /usr/tmpDSK

6) Unmount /tmp partition

[root@antg ~]# umount /tmp

7) Mount the new /tmp filesystem with noexec

[root@antg ~]# mount -o loop,noexec,nosuid,rw /usr/tmpDSK /tmp

8) Set the correct permission for /tmp

[root@antg ~]# 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@antg ~]# 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

7)Restore the content of old /tmp.bkp directory

[root@antg ~]# cp -rpf /tmp.bak/* /tmp

8) Restart the mysql or mysqld and tailwathchd service (if you have CPanel installed).

[root@antg ~]# /etc/init.d/mysqld start

[root@antg ~]# /etc/init.d/httpd start

[root@antg ~]# /scripts/restartsrv_tailwatchd

9)Edit the fstab and replace /tmp entry line with :-

/usr/tmpDSK /tmp ext3 loop,noexec,nosuid,rw 0 0

10) Mount all filesystems

[root@antg ~]# mount -a

Check it now:-

[root@antg ~]# 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

Done.

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Tags: bash