 建立和装载虚拟内存文档（1） 1，查看硬盘并建立单独swap分区/dev/hdb1 [root@daniel ~]# fdisk -l Disk /dev/hda: 6442 MB, 6442450944 bytes 255 heads, 63 sectors/track, 783 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 62 393592+ 82 Linux swap / Solaris /dev/hda3 63 783 5791432+ 83 Linux Disk /dev/hdb: 107 MB, 107374080 bytes 16 heads, 63 sectors/track, 208 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Device Boot Start End Blocks Id System [root@daniel ~]# fdisk /dev/hdb Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-208, default 1): Using default value 1 Last cylinder or +size or +sizeM or +sizeK (1-208, default 208): +50M Command (m for help): p Disk /dev/hdb: 107 MB, 107374080 bytes 16 heads, 63 sectors/track, 208 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Device Boot Start End Blocks Id System /dev/hdb1 1 98 49360+ 83 Linux Command (m for help): t Selected partition 1 Hex 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 b 12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f1 SpeedStor 14 Hidden FAT16 <3 61 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 auto 18 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): 82 Changed system type of partition 1 to 82 (Linux swap / Solaris) Command (m for help): p Disk /dev/hdb: 107 MB, 107374080 bytes 16 heads, 63 sectors/track, 208 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Device Boot Start End Blocks Id System /dev/hdb1 1 98 49360+ 82 Linux swap / Solaris Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. 2，格式化单独的swap分区 [root@daniel ~]# partprobe #重新检测分区 [root@daniel ~]# mkswap /dev/hdb1 Setting up swapspace version 1, size = 50540 kB 3，开启swap分区，并用swapon -s和free来查看 [root@daniel ~]# swapon /dev/hdb1 [root@daniel ~]# swapon -s Filename Type Size Used Priority /dev/hda2 partition 393584 0 -1 /dev/hdb1 partition 49352 0 -2 [root@daniel ~]# free total used free shared buffers cached Mem: 515600 40008 475592 0 5592 24056 -/+ buffers/cache: 10360 505240 Swap: 442936 0 442936 4，关掉swap分区再次查看，前后比较一下就能够了 [root@daniel ~]# swapoff /dev/hdb1 [root@daniel ~]# swapon -s Filename Type Size Used Priority /dev/hda2 partition 393584 0 -1 [root@daniel ~]# free total used free shared buffers cached Mem: 515600 40008 475592 0 5596 24068 -/+ buffers/cache: 10344 505256 Swap: 393584 0 393584 5，最后把这个swap分区写进/etc/fstab或在/etc/rc.local中加入swapon /dev/hdb1都会使swap分区在开机时自动启动 |
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