Centos查看内存硬盘信息

1、 top命令

top命令经常用来监控linux的系统状况，比如cpu、内存的使用，程序员基本都知道这个命令。
按 q 退出

2、free -m:看内存占用

主要看第一行Mem 总共 15710 M , 使用了 823 M , 剩余空闲 7895 M 。这个shared 223M 也不知道用在哪里。

3、 df -h ：看硬盘占用率

4、 fdisk -l 

[root@LogServer ~]# fdisk -l

Disk /dev/sda: 146.7 GB, 146685296640 bytes
255 heads, 63 sectors/track, 17833 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: 0x000b5c42

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64       17834   142734336   8e  Linux LVM

Disk /dev/mapper/VolGroup-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 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/mapper/VolGroup-lv_swap: 4160 MB, 4160749568 bytes
255 heads, 63 sectors/track, 505 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/mapper/VolGroup-lv_home: 88.3 GB, 88311070720 bytes
255 heads, 63 sectors/track, 10736 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

5、 lsblk 

[root@LogServer ~]# lsblk
NAME                        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                           8:0    1 136.6G  0 disk 
+¦sda1                        8:1    1   500M  0 part /boot
L¦sda2                        8:2    1 136.1G  0 part 
  +¦VolGroup-lv_root (dm-0) 253:0    0    50G  0 lvm  /
  +¦VolGroup-lv_swap (dm-1) 253:1    0   3.9G  0 lvm  [SWAP]
  L¦VolGroup-lv_home (dm-2) 253:2    0  82.3G  0 lvm  /home
sr0                          11:0    1  1024M  0 rom  

1,lsblk 　　　　                                 查看分区和磁盘

2,df -h 　　                                        查看空间使用情况

3,fdisk -l 　　                                    分区工具查看分区信息

4,cfdisk /dev/sda  　　                      查看分区

5,blkid 　                                       　查看硬盘label（别名）

6,du -sh ./* 　　                                统计当前目录各文件夹大小

7,free -h 　                                    　查看内存大小

8,cat /proc/cpuinfo| grep "cpu cores"| uniq  　　查看cpu核心