系统最小化安装后，使用命令时提示“command not found”

虚拟机新加块硬盘，分区时，提示 " command not found".

直接yum也无法安装... ...

[root@Cacti ~]# fdisk -l

Disk /dev/sda: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000a1889

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          66      524288   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              66         588     4194304   82  Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/sda3             588       13055   100137984   83  Linux

Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table
[root@Cacti ~]# pvcreate /dev/sdb
-bash: pvcreate: command not found
You have new mail in /var/spool/mail/root
[root@Cacti ~]# pvdisplay
-bash: pvdisplay: command not found
[root@Cacti ~]# yum install pvdisplay
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
No package pvdisplay available.

很郁闷吧，本来就菜，想办法吧！于是登录到一台完整安装的系统上。

[root@localhost localhost]# pvdispaly
-bash: pvdispaly: command not found
[root@localhost localhost]# pvcreate
  Please enter a physical volume path
  Run `pvcreate --help' for more information.
[root@localhost localhost]# which pvcreate
/sbin/pvcreate
[root@localhost localhost]# rpm -qf /sbin/pvcreate
lvm2-2.02.72-8.el6_0.4.x86_64

找到了，就是这个了，lvm2

[root@Cacti ~]# yum install lvm2-2.02.72-8.el6_0.4.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
No package lvm2-2.02.72-8.el6_0.4.x86_64 available.
Error: Nothing to do
[root@Cacti ~]# yum install lvm2
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
Setting up Install Process
Resolving Dependencies
......................................                                                                                                                                                       576 kB/s | 1.8 MB     00:03
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : libudev-147-2.42.el6.x86_64                                                                                                                                             1/7
  Installing : device-mapper-libs-1.02.74-10.el6.x86_64                                                                                                                                2/7
  Installing : device-mapper-1.02.74-10.el6.x86_64                                                                                                                                     3/7
  Installing : device-mapper-event-libs-1.02.74-10.el6.x86_64                                                                                                                          4/7
  Installing : device-mapper-event-1.02.74-10.el6.x86_64                                                                                                                               5/7
  Installing : lvm2-libs-2.02.95-10.el6.x86_64                                                                                                                                         6/7
  Installing : lvm2-2.02.95-10.el6.x86_64                                                                                                                                              7/7

Installed:
  lvm2.x86_64 0:2.02.95-10.el6

Dependency Installed:
  device-mapper.x86_64 0:1.02.74-10.el6     device-mapper-event.x86_64 0:1.02.74-10.el6     device-mapper-event-libs.x86_64 0:1.02.74-10.el6     device-mapper-libs.x86_64 0:1.02.74-10.el6
  libudev.x86_64 0:147-2.42.el6             lvm2-libs.x86_64 0:2.02.95-10.el6

Complete!
You have new mail in /var/spool/mail/root
[root@Cacti ~]# pvcreate /dev/sdb
  Writing physical volume data to disk "/dev/sdb"
  Physical volume "/dev/sdb" successfully created
[root@Cacti ~]# pvdisplay
  "/dev/sdb" is a new physical volume of "20.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb
  VG Name
  PV Size               20.00 GiB
  Allocatable           NO
  PE Size               0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               Li76jc-Hbq2-9TsD-Fcui-3XZA-YDxS-Ma6bN5

[root@Cacti ~]#

看到了吧，可以用了！！