How to add a swap partition to CentOS6.5

When adding Zabbix monitoring to the server, it was found that the server had an error "Lack of free swap space on localhost", by looking to know that when installing the server forgot to divide the swap partition. To reduce the error, now directly divide the swap partition, the following steps:

1, create a swap partition with the DD command

[[email protected] home]# dd If=/dev/zero of=/home/swap bs=1024 count=81920008192000+0 Records in8192000+0 Records out838 8608000 bytes (8.4 GB) copied, 33.5006 s, MB/s

This creates a/home/swap file with a partition size of 8G and then formats the partition file.

2. Format the/home/swap file.

[Email protected] home]# mkswap/home/swap mkswap:/home/swap:warning:don ' t erase bootbits sectors on whole disk . Use-f to force. Setting up Swapspace version 1, size = 8191996 kibno label, UUID=4AE031DD-EEFE-43BA-8FB0-C09719D896B6

Span style= "line-height:0px;" > 3, swapon with/home/command Swap files divided into swap partitions

[[email protected] home]# swapon /home/swap [[email protected] home]#  free -m             total        used       free      shared    buffers     cachedmem:           7872       7730         142          0          70       6394-/+ buffers/cache:        1264       6608Swap:          7999          0        7999 

4. Modify the /etc/fstab file to add/home/swap swap default 00, which can be mounted automatically even if restarted.

[[Email protected] home]# vi /etc/fstab ## /etc/fstab# created by  anaconda on tue jan 26 21:10:02 2016## accessible filesystems,  by reference, are maintained under  '/dev/disk ' # see man pages  fstab (5),  findfs (8),  mount (8)  and/or blkid (8)  for more info#uuid= f8cb78d5-8419-4bcf-8684-9e8a94480f22 /                        ext4    defaults         1 1uuid=9e4bacd3-490c-4e87-a5e0-fec240a3e229 /usr                      xfs     defaults        1  2tmpfs                   /dev/shm                 tmpfs    defaults        0 0devpts                   /dev/pts                 devpts  gid=5,mode=620   0 0sysfs                    /sys                     sysfs   defaults         0 0proc                     /proc                    proc    defaults        0 0  /home/swap             swap                     swap     default         0 0 "/etc/fstab"  16l, 788c written

Note: Calculation formula for count: count=size*1024 (SIZE in megabytes)

This article is from the "Breght Moon" blog, make sure to keep this source http://liqingbiao.blog.51cto.com/3044896/1740320

How to add a swap partition to CentOS6.5