虚拟机新加块硬盘，分区时，提示 " command not found".

直接yum也无法安装... ...

1. [root@Cacti ~]# fdisk -l 
2.  
3. Disk /dev/sda: 107.4 GB, 107374182400 bytes 
4. 255 heads, 63 sectors/track, 13054 cylinders 
5. Units = cylinders of 16065 * 512 = 8225280 bytes 
6. Sector size (logical/physical): 512 bytes / 512 bytes 
7. I/O size (minimum/optimal): 512 bytes / 512 bytes 
8. Disk identifier: 0x000a1889 
9.  
10.    Device Boot      Start         End      Blocks   Id  System 
11. /dev/sda1   *           1          66      524288   83  Linux 
12. Partition 1 does not end on cylinder boundary. 
13. /dev/sda2              66         588     4194304   82  Linux swap / Solaris 
14. Partition 2 does not end on cylinder boundary. 
15. /dev/sda3             588       13055   100137984   83  Linux 
16.  
17. Disk /dev/sdb: 21.5 GB, 21474836480 bytes 
18. 255 heads, 63 sectors/track, 2610 cylinders 
19. Units = cylinders of 16065 * 512 = 8225280 bytes 
20. Sector size (logical/physical): 512 bytes / 512 bytes 
21. I/O size (minimum/optimal): 512 bytes / 512 bytes 
22. Disk identifier: 0x00000000 
23.  
24. Disk /dev/sdb doesn't contain a valid partition table 
25. [root@Cacti ~]# pvcreate /dev/sdb  
26. -bash: pvcreate: command not found 
27. You have new mail in /var/spool/mail/root 
28. [root@Cacti ~]# pvdisplay 
29. -bash: pvdisplay: command not found 
30. [root@Cacti ~]# yum install pvdisplay 
31. Loaded plugins: fastestmirror 
32. Loading mirror speeds from cached hostfile 
33.  * base: centos.ustc.edu.cn 
34.  * extras: centos.ustc.edu.cn 
35.  * updates: centos.ustc.edu.cn 
36. Setting up Install Process 
37. 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。

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

找到了，就是这个了，lvm2

1. [root@Cacti ~]# yum install lvm2-2.02.72-8.el6_0.4.x86_64 
2. Loaded plugins: fastestmirror 
3. Loading mirror speeds from cached hostfile 
4.  * base: centos.ustc.edu.cn 
5.  * extras: centos.ustc.edu.cn 
6.  * updates: centos.ustc.edu.cn 
7. Setting up Install Process 
8. No package lvm2-2.02.72-8.el6_0.4.x86_64 available. 
9. Error: Nothing to do 
10. [root@Cacti ~]# yum install lvm2 
11. Loaded plugins: fastestmirror 
12. Loading mirror speeds from cached hostfile 
13.  * base: centos.ustc.edu.cn 
14.  * extras: centos.ustc.edu.cn 
15.  * updates: centos.ustc.edu.cn 
16. Setting up Install Process 
17. Resolving Dependencies 
18. ......................................                                                                                                                                                       576 kB/s | 1.8 MB     00:03      
19. Running rpm_check_debug 
20. Running Transaction Test 
21. Transaction Test Succeeded 
22. Running Transaction 
23.   Installing : libudev-147-2.42.el6.x86_64                                                                                                                                             1/7  
24.   Installing : device-mapper-libs-1.02.74-10.el6.x86_64                                                                                                                                2/7  
25.   Installing : device-mapper-1.02.74-10.el6.x86_64                                                                                                                                     3/7  
26.   Installing : device-mapper-event-libs-1.02.74-10.el6.x86_64                                                                                                                          4/7  
27.   Installing : device-mapper-event-1.02.74-10.el6.x86_64                                                                                                                               5/7  
28.   Installing : lvm2-libs-2.02.95-10.el6.x86_64                                                                                                                                         6/7  
29.   Installing : lvm2-2.02.95-10.el6.x86_64                                                                                                                                              7/7  
30.  
31. Installed: 
32.   lvm2.x86_64 0:2.02.95-10.el6                                                                                                                                                                  
33.  
34. Dependency Installed: 
35.   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     
36.   libudev.x86_64 0:147-2.42.el6             lvm2-libs.x86_64 0:2.02.95-10.el6               
37.  
38. Complete! 
39. You have new mail in /var/spool/mail/root 
40. [root@Cacti ~]# pvcreate /dev/sdb  
41.   Writing physical volume data to disk "/dev/sdb" 
42.   Physical volume "/dev/sdb" successfully created 
43. [root@Cacti ~]# pvdisplay 
44.   "/dev/sdb" is a new physical volume of "20.00 GiB" 
45.   --- NEW Physical volume --- 
46.   PV Name               /dev/sdb 
47.   VG Name                
48.   PV Size               20.00 GiB 
49.   Allocatable           NO 
50.   PE Size               0    
51.   Total PE              0 
52.   Free PE               0 
53.   Allocated PE          0 
54.   PV UUID               Li76jc-Hbq2-9TsD-Fcui-3XZA-YDxS-Ma6bN5 
55.     
56. [root@Cacti ~]#  

看到了吧，可以用了！！