Linux下查看版本号的命令

1，查看内核版本命令：
cat /proc/version
uname -a
uname -rcat /etc/issue
man uname
2，查看linux版本：抄录如下：
1) 登录到服务器执行 lsb_release -a ，即可列出所有版本信息，例如：
[root@3.5.5Biz-46 ~]# lsb_release -a
LSB Version: 1.3
Distributor ID: RedHatEnterpriseAS
Descrīption: Red Hat Enterprise Linux AS release 4 (Nahant Update 1)
Release: 4
Codename: NahantUpdate1
[root@3.5.5Biz-46 ~]#
这个命令适用于所有的linux，包括Redhat、SuSE、Debian等发行版。
2) 登录到linux执行cat /etc/redhat-release ，例如如下：
[root@3.5.5Biz-46 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 1)
[root@3.5.5Biz-46 ~]#
这种方式下可以直接看到具体的版本号，比如 AS4 Update 1
3）登录到linux执行rpm -q redhat-release ，例如如下
[root@3.5.5Biz-46 ~]# rpm -q redhat-release
redhat-release-4AS-2.4
[root@3.5.5Biz-46 ~]#
这种方式下可看到一个所谓的release号，比如上边的例子是2.4
这个release号和实际的版本之间存在一定的对应关系，如下：
redhat-release-3AS-1 -> Redhat Enterprise Linux AS 3
redhat-release-3AS-7.4 -> Redhat Enterprise Linux AS 3 Update 4
redhat-release-4AS-2 -> Redhat Enterprise Linux AS 4
redhat-release-4AS-2.4 -> Redhat Enterprise Linux AS 4 Update 1
redhat-release-4AS-3 -> Redhat Enterprise Linux AS 4 Update 2
redhat-release-4AS-4.1 -> Redhat Enterprise Linux AS 4 Update 3
redhat-release-4AS-5.5 -> Redhat Enterprise Linux AS 4 Update 4
注意：第（2）（3）两种方法只对Redhat Linux有效
Last login: Tue Aug 5 14:23:17 2008 from 10.140.70.229
sc
sc@taishan /home/sc >
sc@taishan /home/sc >
sc@taishan /home/sc > sc
-sh: sc: command not found
sc@taishan /home/sc > uname -a
Linux taishan 2.6.9-42.14.ELsmp #1 SMP Wed Sep 27 18:31:19 EDT 2006 i686 i686 i386 GNU/Linux
sc@taishan /home/sc > cat   /proc/version
Linux version 2.6.9-42.14.ELsmp (brewbuilder@hs20-bc2-3.build.redhat.com) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)) #1 SMP Wed Sep 27 18:31:19 EDT 2006
sc@taishan /home/sc > uname   -rcat   /etc/issue
uname: invalid option -- c
Try `uname --help' for more information.
sc@taishan /home/sc > cat   /etc/issue
***************************************************************************
NOTICE TO USERS
This computer system is the private property of Nokia, whether
individual, corporate or government. It is for authorized use only.
Users (authorized or unauthorized) have no explicit or implicit
expectation of privacy.
Any or all uses of this system and all files on this system may be
intercepted, monitored, recorded, copied, audited, inspected, and
disclosed to your employer, to authorized site, government, and law
enforcement personnel, as well as authorized officials of government
agencies, both domestic and foreign.
By using this system, the user consents to such interception, monitoring,
recording, copying, auditing, inspection, and disclosure at the
discretion of such personnel or officials. Unauthorized or improper use
of this system may result in civil and criminal penalties and
administrative or disciplinary action, as appropriate. By continuing to use
this system you indicate your awareness of and consent to these terms
and conditions of use. LOG OFF IMMEDIATELY if you do not agree to the
conditions stated in this warning.
****************************************************************************
sc@taishan /home/sc > uname -r
2.6.9-42.14.ELsmp
sc@taishan /home/sc > lsb_release -a
-sh: lsb_release: command not found
sc@taishan /home/sc > su -
Password:
su: incorrect password
sc@taishan /home/sc > su -
Password:
[root@taishan ~]# lsb_release -a
-bash: lsb_release: command not found
[root@taishan ~]# lsb_release -a
-bash: lsb_release: command not found
[root@taishan ~]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
[root@taishan ~]# rpm -q redhat-release
redhat-release-4AS-5.5
[root@taishan ~]#