日期:2014-05-16  浏览次数:20608 次

Linux下调整根目录的空间大小
一、目的

在使用CentOS6.3版本linux系统的时候,发现根目录(/)的空间不是很充足,而其他目录空间有很大的空闲,所以本文主要是针对现在已有的空间进行调整。首先,先来查看一下系统的空间分配情况:




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01.[root@CentOS-78 /]# df -h 
02.Filesystem            Size  Used Avail Use% Mounted on 
03./dev/mapper/vg_centos-lv_root 
04.                       50G   14G   34G  30% / 
05.tmpfs                 1.9G     0  1.9G   0% /dev/shm 
06./dev/sda1             485M   37M  423M   8% /boot 
07./dev/mapper/vg_centos-lv_home 
08.                      404G  670M  382G   1% /home 
下面的详细步骤部分将从vg_centos-lv_home分区下取出100G的空间添加到/vg_centos-lv_root分区上去。

二、详细步骤

1、卸载vg_centos-lv_home分区




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01.[root@CentOS-78 /]# umount /home 
此时在用df命令查看将会发现/home目录已经看不见了,如下所示:




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01.[root@CentOS-78 /]# df -h 
02.Filesystem            Size  Used Avail Use% Mounted on 
03./dev/mapper/vg_centos-lv_root 
04.                       50G   14G   34G  30% / 
05.tmpfs                 1.9G     0  1.9G   0% /dev/shm 
06./dev/sda1             485M   37M  423M   8% /boot 


2、从新设定vg_home-lv_home的大小




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01.[root@CentOS-78 /]# resize2fs -p /dev/mapper/vg_centos-lv_home 282G 
02.resize2fs 1.41.12 (17-May-2010) 
03.Please run 'e2fsck -f /dev/mapper/vg_centos-lv_home' first. 
这一步设定vg_home-lv_home大小没有成功,系统提示我们先运行下面的命令,操作如下:




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01.[root@CentOS-78 /]# e2fsck -f /dev/mapper/vg_centos-lv_home 
02.e2fsck 1.41.12 (17-May-2010) 
03.Pass 1: Checking inodes, blocks, and sizes 
04.Pass 2: Checking directory structure 
05.Pass 3: Checking directory connectivity 
06.Pass 4: Checking reference counts 
07.Pass 5: Checking group summary information 
08./dev/mapper/vg_centos-lv_home: 1386/26836992 files (0.9% non-contiguous), 1855856/107344896 blocks 
从新设定vg_home-lv_home的大小:




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01.[root@CentOS-78 /]# resize2fs -p /dev/mapper/vg_centos-lv_home 282G 
02.resize2fs 1.41.12 (17-May-2010) 
03.Resizing the filesystem on /dev/mapper/vg_centos-lv_home to 73924608 (4k) blocks. 
04.Begin pass 2 (max = 43) 
05.Relocating blocks             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 
06.Begin pass 3 (max = 3276) 
07.Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 
08.Begin pass 4 (max = 266) 
09.Updating inode references     XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX