如何查看centos系统cpu/内存使用情况

1.查看硬盘

[mushme@investide ~]$ df -ah

文件系统容量已用可用已用% 挂载点

/dev/cciss/c0d0p1 123G 63G 55G 54% /

proc 0 0 0 – /proc

sysfs 0 0 0 – /sys

devpts 0 0 0 – /dev/pts

tmpfs 2.0G 0 2.0G 0% /dev/shm

none 0 0 0 – /proc/sys/fs/binfmt_misc

sunrpc 0 0 0 – /var/lib/nfs/rpc_pipefs

nfsd 0 0 0 – /proc/fs/nfsd

查看目录大小

du -sh /project

2.查看内存

[mushme@investide ~]$ free -m

total used free shared buffers cached

Mem: 3916 3281 634 0 135 1858

-/+ buffers/cache: 1287 2628

Swap: 10000 235 9765

或者用下面这个命令

cat /proc/meminfo

3.查看cpu

[mushme@investide ~]$ cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

8 Intel(R) Xeon(R) CPU E5506 @ 2.13GHz

说明是8个逻辑cpu

[mushme@investide ~]$ cat /proc/cpuinfo | grep physical | uniq -c

4 physical id : 0

4 physical id : 1

实际是2个cpu

[mushme@investide ~]$ getconf LONG_BIT

当前cpu运行在32位下

[mushme@investide ~]$ cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l

(结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)

再完整看cpu详细信息, 不过大部分我们都不关心而已.
# dmidecode | grep 'Processor Information'

4.查看当前操作系统内核信息

[mushme@investide ~]$ uname -a

Linux investide.cn 2.6.18-238.9.1.el5PAE #1 SMP Tue Apr 12 18:52:55 EDT 2011 i686 i686 i386 GNU/Linux

5.查看网卡信息

# dmesg | grep -i eth

6.查看系统

cat /etc/issue