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[root@lxt lxt]# free -m
total used free shared buffers cached
Mem: 498 357 141 0 27 162
-/+ buffers/cache: 167 331
Swap: 1023 0 1023
2¡¢ÊäÈëdf -B M£¨»òdf -m£©²é¿´¸÷·ÖÇøµ±Ç°Ê¹ÓÃÇé¿ö
[root@lxt lxt]# df -B M
Îļþϵͳ 1M-¿é ÒÑÓà ¿ÉÓà ÒÑÓÃ% ¹ÒÔØµã
/dev/mapper/vg_lxt-lv_root
12875M 4059M 8162M 34% /
/dev/sda7 194M 14M 170M 8% /boot
tmpfs 250M 1M 249M 1% /dev/shm
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3¡¢Ñ¡ÔñÒ»¸ö½Ï´óµÄ·ÖÇø£¬½¨Á¢·ÖÇøÎļþ£º
[root@lxt lxt]# dd if=/dev/zero of=/swapadd bs=1024 co
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