查看系统版本:lsb_release -a
[root@localhost /]# lsb_release -a
LSB Version: :core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 6.1 (Final)
Release: 6.1
Codename: Final
查看内核版本:uname -a
Linux localhost.localdomain 2.6.32-131.0.15.el6.x86_64 #1 SMP Sat Nov 12 15:11:58 CST 2011 x86_64 x86_64 x86_64 GNU/Linux
查看cpu型号:cat /proc/cpuinfo
[root@localhost /]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU E5506 @ 2.13GHz
......
# 查看物理CPU个数
cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l
查看硬盘空间情况df -lm
[root@localhost /]# df -l
文件系统 1K-块 已用 可用 已用% 挂载点
/dev/sda3 604758736 20379244 553659492 4% /
tmpfs 8160484 0 8160484 0% /dev/shm
/dev/sda1 495844 35901 434343 8% /boot
/dev/sda5 302379456 4760128 282259328 2% /opt
查看内存:free -m
[root@localhost /]# free -mt
total used free shared buffers cached
Mem: 15938 14204 1734 0 356 10597
-/+ buffers/cache: 3250 12688
Swap: 19997 0 19997
Total: 35936 14204 21732
Swap为虚拟内存，当物理内存不够时,系统就会使用到swap,但swap速度比真实内存的速度要慢的多,当你电脑用到swap的时候,说明你内存不够了,需要加内存
