第一种方法：新增交换分割槽的方式实现如下：1：检视我原来的交换分割槽的大小：使用 swapon 命令：[root@mail /]# swapon -sFilename Type Size Used Priority/dev/sda3 partition 522104 0 -1
2：新增一块交换分割槽使用 fdisk 命令 # fdisk /dev/sdbDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabelBuilding a new DOS disklabel. Changes will remain in memory only,until you decide to write them. After that, of course, the previouscontent won’t be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
Command (m for help): nCommand action e extended p primary partition (1-4)p Partition number (1-4): 1First cylinder (1-261, default 1): Using default value 1Last cylinder or +size or +sizeM or +sizeK (1-261, default 261): Using default value 261
Command (m for help): p
Disk /dev/sdb: 2147 MB, 2147483648 bytes255 heads, 63 sectors/track, 261 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System/dev/sdb1 1 261 2096451 83 LinuxCommand (m for help): tSelected partition 1Hex code (type L to list codes): l
0 Empty 1e Hidden W95 FAT1 80 Old Minix be Solaris boot 1 FAT12 24 NEC DOS 81 Minix / old Lin bf Solaris 2 XENIX root 39 Plan 9 82 Linux swap / So c1 DRDOS/sec (FAT-3 XENIX usr 3c PartitionMagic 83 Linux c4 DRDOS/sec (FAT-4 FAT16 32M 40 Venix 80286 84 OS/2 hidden C: c6 DRDOS/sec (FAT-5 Extended 41 PPC PReP Boot 85 Linux extended c7 Syrinx 6 FAT16 42 SFS 86 NTFS volume set da Non-FS data 7 HPFS/NTFS 4d QNX4.x 87 NTFS volume set db CP/M / CTOS / .8 AIX 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility 9 AIX bootable 4f QNX4.x 3rd part 8e Linux LVM df BootIt a OS/2 Boot Manag 50 OnTrack DM 93 Amoeba e1 DOS access b W95 FAT32 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O c W95 FAT32 (LBA) 52 CP/M 9f BSD/OS e4 SpeedStor e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs f W95 Ext’d (LBA) 54 OnTrackDM6 a5 FreeBSD ee EFI GPT 10 OPUS 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/11 Hidden FAT12 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f1 SpeedStor 14 Hidden FAT16 SpeedStor a9 NetBSD f4 SpeedStor 16 Hidden FAT16 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary 17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fd Linux raid auto18 AST SmartSleep 65 Novell Netware b8 BSDI swap fe LANstep 1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid ff BBT 1c Hidden W95 FAT3 75 PC/IX Hex code (type L to list codes): 82Changed system type of partition 1 to 82(Linux swap)Command (m for help): p
Disk /dev/sdb: 2147 MB, 2147483648 bytes255 heads, 63 sectors/track, 261 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System/dev/sdb1 1 261 2096451 82 Linux swap #交换分割槽格式
Command (m for help): wThe partition table has been altered!
Calling ioctl() to re-read partition table.Syncing disks.
3：格式化 swap 交换分割槽，建立交换档案系统使用命令：mkswap# mkswap /dev/sdb1Setting up swapspace version 1, size = 2146758 kB4: 启用交换分割槽：使用命令：swapon# swapon /dev/sdb15: 检视新添的交换分割槽是否存在了：执行命令：swapon –s# swapon -sFilename Type Size Used Priority/dev/sda3 partition 522104 0 -1/dev/sdb1 partition 2096440 0 -2
6: 编辑/etc/fstab 档案，使交换分割槽在引导时启用/deb/sdb1 swap swap defaults 0 0
第二种方法: 使用档案构建 swap
# dd if=/dev/zero of=/home/swap bs=1M count=1024
1024000+0 records in 1024000+0 records out
设定交换档案：
# mkswap /home/swap Setting up swapspace version 1, size = 1023996 KiB
3． 启动交换分割槽档案
假如想立即启用交换分割槽档案，请执行：
# swapon /home/swap
检验增加后的 swap 分割槽大小
# free -m
total used free shared buffers cached Mem: 1006 994 12 0 4 929 -/+ buffers/cache: 60 946 Swap: 999 0 999
4． 如希望在系统再次启动时，自动启用刚增加的 swap，可编辑/etc/fstab 档案：
# vi /etc/fstab，增加如下行
/home/swap swap swap defaults 0 0
