swap分区扩展实际演练
linux:~ # free -m
total used free shared buffers cached
Mem: 250 241 9 0 43 54
-/+ buffers/cache: 143 107
Swap: 501 0 501
linux:~ # lscd /uls
. .DCOPserver_linux__0 .bash_history .fonts .gconf .gnome2 .kbd .mozilla .skel Desktop
.. .ICEauthority .dmrc .fonts.cache-1 .gconfd .gnome2_private .kde .qt .viminfo bin
.DCOPserver_linux_:0 .Xauthority .exrc .fvwm .gnome .gnupg .mcop .rnd .xsession-errors
linux:~ # mkdir study
linux:~ # cd study
linux:~/study # ls
. ..
linux:~/study # mkdir swap
linux:~/study # cd swap/
linux:~/study/swap # ls
. ..
linux:~/study/swap # dd if=/dev/zero of=swapoffile bs=1024 count=10000
10000+0 records in
10000+0 records out
linux:~/study/swap # ls -al
total 10010
drwxr-xr-x 2 root root 72 Jul 5 07:24 .
drwxr-xr-x 3 root root 72 Jul 5 07:23 ..
-rw-r--r-- 1 root root 10240000 Jul 5 07:24 swapfile
linux:~/study/swap # mkswap swapfile
Setting up swapspace version 1, size = 10235 kB
linux:~/study/swap # du -h swapfile
9.8Mswapfile
linux:~/study/swap # swapon swapfile
linux:~/study/swap # swapon swapfile
du -h swapfile mkswap swapfilels -al
total 10010
drwxr-xr-x 2 root root 72 Jul 5 07:24 .
drwxr-xr-x 3 root root 72 Jul 5 07:23 ..
-rw-r--r-- 1 root root 10240000 Jul 5 07:25 swapfile
linux:~/study/swap # free -m
total used free shared buffers cached
Mem: 250 246 4 0 37 66
-/+ buffers/cache: 142 107
Swap: 511 0 511
linux:~/study/swap # free
total used free shared buffers cached
Mem: 256624 252600 4024 0 38300 67968
-/+ buffers/cache: 146332 110292
Swap: 524032 8 524024
linux:~/study/swap # cd
linux:~ # cd /etc/
linux:/etc # vi fstab
"fstab" 8L, 680C/dev/sda2/reiserfs acl,user_xattr1 1
/dev/sda1swapswappri=420 0
devpts/dev/ptsdevpts mode=0620,gid=50 0
proc/procprocdefaults0 0
usbfs/proc/bus/usbusbfs noauto0 0
sysfs/syssysfs noauto0 0
/dev/dvd/media/dvdsubfs fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0
/dev/fd0/media/floppysubfs fs=floppyfss,procuid,nodev,nosuid,sync 0 0
~
~
~1,1All8-- INSERT --8,2All8,1All-- INSERT --8,96All9,1 /2s3s432s3t4u5d6y7/8s9w10a1p2/3s4w5a6p7f8i9l20e123456s7w8a9p30123456789401234s5w6a7p89501234p5r6i7=84926012345678970123456078099,78All:wq"fstab" 9L, 759C written
linux:/etc # more fstab
/dev/sda2 / reiserfs acl,user_xattr 1 1
/dev/sda1 swap swap pri=42 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
proc /proc proc defaults 0 0
usbfs /proc/bus/usb usbfs noauto 0 0
sysfs /sys sysfs noauto 0 0
/dev/dvd /media/dvd subfs fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0
/dev/fd0 /media/floppy subfs fs=floppyfss,procuid,nodev,nosuid,sync 0 0
/study/swap/swapfile swap swap pri=42 0 0
linux:/etc # cd
linux:~ # cd /studcd /root/
linux:~ # ls
. .DCOPserver_linux__0 .bash_history .fonts .gconf .gnome2 .kbd .mozilla .skel Desktop
.. .ICEauthority .dmrc .fonts.cache-1 .gconfd .gnome2_private .kde .qt .viminfo bin
.DCOPserver_linux_:0 .Xauthority .exrc .fvwm .gnome .gnupg .mcop .rnd .xsession-errors study
linux:~ # cd
linux:~ # vi /etc/fstab
"/etc/fstab" 9L, 759C/dev/sda2/reiserfs acl,user_xattr1 1
/dev/sda1swapswappri=420 0
devpts/dev/ptsdevpts mode=0620,gid=50 0
proc/procprocdefaults0 0
usbfs/proc/bus/usbusbfs noauto0 0
sysfs/syssysfs noauto0 0
/dev/dvd/media/dvdsubfs fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0
/dev/fd0/media/floppysubfs fs=floppyfss,procuid,nodev,nosuid,sync 0 0
/study/swap/swapfile swapswap pri=420 0
~
~
~9,78All765432106987654321059876543210498765432103987654321029876543210198765432109 8765432-- INSERT --9,2Allrstudy/swap/swapfile swap swap pri=42 0 03ostudy/swap/swapfile swap swap pri=42 0 04ostudy/swap/swapfile swap swap pri=42 0 05tstudy/swap/swapfile swap swap pri=42 0 06/study/swap/swapfile swap swap pri=42 0 079,6All:wq"/etc/fstab" 9L, 764C written
linux:~ # free -m
total used free shared buffers cached
Mem: 250 245 5 0 37 65
-/+ buffers/cache: 142 108
Swap: 511 0 511
linux:~ # cd /root/study/swap/
linux:~/study/swap # swaponoff swapfile
linux:~/study/swap # ls -al
total 10010
drwxr-xr-x 2 root root 72 Jul 5 07:24 .
drwxr-xr-x 3 root root 72 Jul 5 07:23 ..
-rw-r--r-- 1 root root 10240000 Jul 5 07:25 swapfile
linux:~/study/swap # free -m
total used free shared buffers cached
Mem: 250 245 4 0 38 65
-/+ buffers/cache: 142 108
Swap: 501 0 501
linux:~/study/swap # free -m
total used free shared buffers cached
Mem: 256624 251896 4728 0 39072 66932
-/+ buffers/cache: 145892 110732
Swap: 514040 8 514032
linux:~/study/swap #
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