Linux如何查看系统各种信息的命令

一：CPU
# more /proc/cpuinfo | grep “model name”
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz

# grep “model name” /proc/cpuinfo
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
model name    : Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz

# grep “model name” /proc/cpuinfo | cut -f2 -d:
Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz
Intel(R) Xeon(R) CPU    X3220 @ 2.40GHz

二：内存
# grep MemTotal /proc/meminfo
MemTotal:      614400 kB

# free -m
total      used      free    shared     buffers    cached
Mem:    600       23       576     0     0     0
-/+ buffers/cache:       23       576
Swap:    0     0     0

# free -m |grep “Mem” | awk ‘{print $2}’
600

三：查看CPU位数(32 or 64)
# getconf WORD_BIT
# getconf LONG_BIT
32

四：查看linux版本
# more /etc/redhat-release
CentOS release 5 (Final)

# more /etc/issue
CentOS release 5 (Final)
Kernel \r on an \m

# more /proc/version
Linux version 2.6.18-92.1.18.el5.028stab060.2PAE ([email=root@rhel5-32-build-xemul]root@rhel5-32-build-xemul[/email]) (gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Tue Jan 13 12:31:30 MSK 2009

五：查看内核版本
# uname -r
2.6.18-92.1.18.el5.028stab060.2PAE

# uname -a
Linux srv.bluestep.cc 2.6.18-92.1.18.el5.028stab060.2PAE #1 SMP Tue Jan 13 12:31:30 MSK 2009 i686 i686 i386 GNU/Linux

六：查看时区
# date -R
Wed, 25 Feb 2009 02:20:50 +0000

# mv /etc/localtime /etc/localtime.save
# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

# date -R
Wed, 25 Feb 2009 10:24:26 +0800

七：主机名
# hostname
www.bluestep.cc

修改主机名
# cat /etc/sysconfig/network

八：查看selinux情况
# sestatus
SELinux status:        disabled

九：网络
IP
# ifconfig | grep ‘inet addr:’| grep -v ‘127.0.0.1’ | cut -d: -f2 | awk ‘{ print $1}’
207.154.202.216

网关
# cat /etc/sysconfig/network
NETWORKING=”yes”
GATEWAY=”192.0.2.1″
HOSTNAME=”srv.bluestep.cc”

dns
# cat /etc/resolv.conf
nameserver 208.74.168.131
nameserver 208.74.168.132
nameserver 4.2.2.1

修改Host文件
# cat /etc/hosts

十：已经安装的软件包
# rpm -qa | wc -l
197

# yum list installed | wc -l
198

十一：磁盘和分区
# df -h
Filesystem    Size    Used    Avail Use    %    Mounted on
/dev/simfs      10G     353M      9.7G       4%    /

# du -sh
353M

# du /etc -sh
4.6M     /etc

十二：查看键盘布局
cat /etc/sysconfig/keyboard
cat /etc/sysconfig/keyboard | grep KEYTABLE | cut -f2 -d=

十三：查看默认语言
# echo $LANG