Creating a Swap File

To add a swap file: Determine the size of the new swap file in megabytes and
multiply by 1024 to determine the number of blocks. For example, the block size
of a 64 MB swap file is 65536. At a shell prompt as root, type the following
command with count being equal to the desired block size:
  • dd if=/dev/zero of=/swapfile bs=1024 count=65536
Setup the swap file with the command:
  • mkswap /swapfile
To enable the swap file immediately but not automatically at boot time:
  • swapon /swapfile
To enable it at boot time, edit /etc/fstab to include the following entry:
  • /swapfile swap swap defaults 0 0
The next time the system boots, it enables the new swap file.

After adding the new swap file and enabling it, verify it is enabled by viewing
the output of the command cat /proc/swaps or free.

Comments

Post a Comment

Popular posts from this blog

A-Z Index of the Apple OS X command line

The tcsh command shell of Darwin (the open source core of OSX) alias Create an alias alloc List used and free memory awk Find and Replace text within file(s) basename Convert a full pathname to just a folder path bash Bourne-Again SHell (Linux) bless Set volume bootability and startup disk options. break Exit from a loop cal Display a calendar case Conditionally perform a command cat Display the contents of a file cd Change Directory chflags Change a file or folder's flags. chgrp Change group ownership chmod Change access permissions chown Change file owner and group chroot Run a command with a different root directory cksum Print CRC checksum and byte counts clear Clear terminal screen cmp Compare two files comm Compare two sorted files line by line complete Edit a command completion [word/pattern/list] continue Resume the next iteration of a loop cp ...
Read more

Archiving File Systems With ACLs

Warning The tar and dump commands do not backup ACLs. The star utility is similar to the tar utility in that it can be used to generate archives of files. The star package is required to use this utility. The command line options for Star are as follows
Read more

A-Z Index of the Linux BASH command line

alias Create an alias apropos Search Help manual pages (man -k) awk Find and Replace text, database sort/validate/index break Exit from a loop builtin Run a shell builtin bzip2 Compress or decompress named file(s) cal Display a calendar case Conditionally perform a command cat Display the contents of a file cd Change Directory cfdisk Partition table manipulator for Linux chgrp Change group ownership chmod Change access permissions chown Change file owner and group chroot Run a command with a different root directory cksum Print CRC checksum and byte counts clear Clear terminal screen cmp Compare two files comm Compare two sorted files line by line command Run a command - ignoring shell functions continue Resume the next iteration of a loop cp Copy one or more files to another location cron Daemon to execute scheduled commands crontab Schedule a command to run at a later time c...
Read more