拿到一个系统，肯定要看看系统配置，linux下看配置，可没有windows那么直观。你只能一个一个查看。
这个vps是centos5.0，不过已经把内核升级到最新版，也就是和centos5.2的内核一样。这个vps，其实就是一个精简版的centos。比你最小化安装还要小。很多没有用的文件，都已经删除。你看看下面的信息就知道了，只有340m。先搞清楚系统情况，然后再去在上面安装iredmail。
一：cpu
[root@srv /]# 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
[root@srv /]# 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
[root@srv /]# 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
[root@srv /]# grep MemTotal /proc/meminfo
MemTotal: 614400 kB
[root@srv /]# free -m
total used free shared buffers cached
Mem: 600 23 576 0 0 0
-/+ buffers/cache: 23 576
Swap: 0 0 0
[root@srv /]# free -m |grep "Mem" | awk '{print $2}'
600
三：查看CPU位数(32 or 64)
[root@srv /]# getconf LONG_BIT
32
四：查看linux版本
[root@srv /]# more /etc/redhat-release
CentOS release 5 (Final)
[root@srv /]# more /etc/issue
CentOS release 5 (Final)
Kernel \r on an \m
[root@srv /]# more /proc/version
Linux version 2.6.18-92.1.18.el5.028stab060.2PAE (root@rhel5-32-build-xemul) (gc
c 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
[root@srv /]# uname -r
2.6.18-92.1.18.el5.028stab060.2PAE
[root@srv /]# uname -a
Linux srv.eddiechen.cn 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
[root@srv /]# date -R
Wed, 25 Feb 2009 02:20:50 +0000
[root@srv /]# mv /etc/localtime /etc/localtime.save
[root@srv /]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
[root@srv /]# date -R
Wed, 25 Feb 2009 10:24:26 +0800
七：主机名
[root@srv /]# hostname
srv.eddiechen.cn
八：查看selinux情况
[root@srv /]# sestatus
SELinux status: disabled
九：网络
IP
[root@srv /]# ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'
207.154.202.216
网关
[root@srv /]# cat /etc/sysconfig/network
NETWORKING="yes"
GATEWAY="192.0.2.1"
HOSTNAME="srv.eddiechen.cn"
dns
[root@srv /]# cat /etc/resolv.conf
nameserver 208.74.168.131
nameserver 208.74.168.132
nameserver 4.2.2.1
十：已经安装的软件包
[root@srv /]# rpm -qa | wc -l
197
[root@srv /]# yum list installed | wc -l
198
十一：磁盘和分区
[root@srv /]# df -h
Filesystem Size Used Avail Use % Mounted on
/dev/simfs 10G 353M 9.7G 4% /
[root@srv /]# du -sh
353M
[root@srv /]# du /etc -sh
4.6M /etc
十二：系统启动的服务
[root@srv ~]# chkconfig --list | grep 3:on | cut -f1
crond
httpd
iptables
mcstrans
messagebus
network
restorecond
sendmail
sshd
syslog
xinetd
十三：系统默认字符集
[root@srv sysconfig]# locale
LANG=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=
十四：列出变量
[root@srv ~]# set
BASH=/bin/bash
BASH_ARGC=()
BASH_ARGV=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="3" [1]="1" [2]="17" [3]="1" [4]="release" [5]="i686-redhat-linux-gnu")
BASH_VERSION='3.1.17(1)-release'
COLORS=/etc/DIR_COLORS
COLUMNS=80
DIRSTACK=()
EUID=0
GROUPS=()
G_BROKEN_FILENAMES=1
HISTFILE=/root/.bash_history
HISTFILESIZE=1000
HISTSIZE=1000
HOME=/root
HOSTNAME=srv.eddiechen.cn
HOSTTYPE=i686
IFS=$' \t\n'
INPUTRC=/etc/inputrc
LESSOPEN='|/usr/bin/lesspipe.sh %s'
LINES=24
LOGNAME=root
LS_COLORS='no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=01;32:*.cmd=01;32:*.exe=01;32:*.com=01;32:*.btm=01;32:*.bat=01;32:*.sh=01;32:*.csh=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tz=01;31:*.rpm=01;31:*.cpio=01;31:*.jpg=01;35:*.gif=01;35:*.bmp=01;35:*.xbm=01;35:*.xpm=01;35:*.png=01;35:*.tif=01;35:'
MACHTYPE=i686-redhat-linux-gnu
MAIL=/var/spool/mail/root
MAILCHECK=60
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
PIPESTATUS=([0]="0")
PPID=3695
PS1='[\u@\h \W]\$ '
PS2='> '
PS4='+ '
PWD=/root
SHELL=/bin/bash
SHELLOPTS=braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor
SHLVL=1
SSH_AUTH_SOCK=/tmp/ssh-SfvoIj3695/agent.3695
SSH_CLIENT='123.123.36.61 1263 22'
SSH_CONNECTION='123.123.36.61 1263 207.154.202.216 22'
SSH_TTY=/dev/pts/0
TERM=linux
UID=0
USER=root
_=USERNAME
[root@srv ~]# env
HOSTNAME=srv.eddiechen.cn
TERM=linux
SHELL=/bin/bash
HISTSIZE=1000
SSH_CLIENT=123.123.36.61 1263 22
SSH_TTY=/dev/pts/0
USER=root
LS_COLORS=no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=01;32:*.cmd=01;32:*.exe=01;32:*.com=01;32:*.btm=01;32:*.bat=01;32:*.sh=01;32:*.csh=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tz=01;31:*.rpm=01;31:*.cpio=01;31:*.jpg=01;35:*.gif=01;35:*.bmp=01;35:*.xbm=01;35:*.xpm=01;35:*.png=01;35:*.tif=01;35:
SSH_AUTH_SOCK=/tmp/ssh-SfvoIj3695/agent.3695
MAIL=/var/spool/mail/root
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
INPUTRC=/etc/inputrc
PWD=/root
SHLVL=1
HOME=/root
LOGNAME=root
SSH_CONNECTION=123.123.36.61 1263 207.154.202.216 22
LESSOPEN=|/usr/bin/lesspipe.sh %s
G_BROKEN_FILENAMES=1
_=/bin/env
[root@srv ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
[root@srv ~]# alias
alias cp='cp -i'
alias l.='ls -d .* --color=tty'
alias ll='ls -l --color=tty'
alias ls='ls --color=tty'
alias mv='mv -i'
alias rm='rm -i'
