1，先确认服务器linux版本：
[root@IDC-D-831 www]# cat /etc/redhat-release Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
2，打开unrar下载官网，确认自己需要的版本： http://pkgs.repoforge.org/unrar/ 
3，wget方法下载rpm包
[root@IDC-D-831 www]# wget http://pkgs.repoforge.org/unrar/unrar-4.1.4-1.el4.rf.i386.rpm
--10:14:30-- http://pkgs.repoforge.org/unrar/unrar-4.1.4-1.el4.rf.i386.rpm
=> `unrar-4.1.4-1.el4.rf.i386.rpm'
Resolving pkgs.repoforge.org... 78.46.17.228
Connecting to pkgs.repoforge.org|78.46.17.228|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://rpmforge.sw.be/redhat/el4/en/i386/rpmforge/RPMS/unrar-4.1.4-1.el4.rf.i386.rpm [following]
--10:14:31-- http://rpmforge.sw.be/redhat/el4/en/i386/rpmforge/RPMS/unrar-4.1.4-1.el4.rf.i386.rpm
=> `unrar-4.1.4-1.el4.rf.i386.rpm'
Resolving rpmforge.sw.be... 78.46.17.228
Connecting to rpmforge.sw.be|78.46.17.228|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://tree.repoforge.org/redhat/el4/en/i386/rpmforge/RPMS/unrar-4.1.4-1.el4.rf.i386.rpm [following]
--10:14:32-- http://tree.repoforge.org/redhat/el4/en/i386/rpmforge/RPMS/unrar-4.1.4-1.el4.rf.i386.rpm
=> `unrar-4.1.4-1.el4.rf.i386.rpm'
Resolving tree.repoforge.org... 78.46.17.228
Connecting to tree.repoforge.org|78.46.17.228|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://apt.sw.be/redhat/el4/en/i386/rpmforge/RPMS/unrar-4.1.4-1.el4.rf.i386.rpm [following]
--10:14:33-- http://apt.sw.be/redhat/el4/en/i386/rpmforge/RPMS/unrar-4.1.4-1.el4.rf.i386.rpm
=> `unrar-4.1.4-1.el4.rf.i386.rpm'
Resolving apt.sw.be... 193.1.193.67
Connecting to apt.sw.be|193.1.193.67|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 114,693 (112K) [application/x-redhat-package-manager]
100%[=================================================================================================================>] 114,693 56.73K/s
10:14:36 (56.63 KB/s) - `unrar-4.1.4-1.el4.rf.i386.rpm' saved [114693/114693]
4，rpm安装
[root@IDC-D-831 www]# rpm -Uvh unrar-4.1.4-1.el4.rf.i386.rpm warning: unrar-4.1.4-1.el4.rf.i386.rpm: V3 DSA signature: NOKEY, key ID 6b8d79e6 Preparing... ########################################### [100%] 1:unrar ########################################### [100%]
5，unrar测试
[root@IDC-D-831 www]# unrar
UNRAR 4.10 freeware Copyright (c) 1993-2012 Alexander Roshal
Usage: unrar - -
<@listfiles...> <path_to_extract\>
e Extract files to current directory
l[t,b] List archive [technical, bare]
p Print file to stdout
t Test archive files
v[t,b] Verbosely list archive [technical,bare]
x Extract files with full path
- Stop switches scanning
@[+] Disable [enable] file lists
ad Append archive name to destination path
ag[format] Generate archive name using the current date
ai Ignore file attributes
ap Set path inside archive
c- Disable comments show
cfg- Disable read configuration
cl Convert names to lower case
cu Convert names to upper case
dh Open shared files
ep Exclude paths from names
ep3 Expand paths to full including the drive letter
f Freshen files
id[c,d,p,q] Disable messages
ierr Send all messages to stderr
inul Disable all messages
kb Keep broken extracted files
n Include only specified file
n@ Read file names to include from stdin
n@ Include files listed in specified list file
o[+|-] Set the overwrite mode
or Rename files automatically
ow Save or restore file owner and group
p[password] Set password
p- Do not query password
r Recurse subdirectories
sl Process files with size less than specified
sm Process files with size more than specified
ta Process files modified after in YYYYMMDDHHMMSS format
tb Process files modified before in YYYYMMDDHHMMSS format
tn Process files newer than
to Process files older than
ts<m,c,a>[N] Save or restore file time (modification, creation, access)
u Update files
v List all volumes
ver[n] File version control
vp Pause before each volume
x Exclude specified file
x@ Read file names to exclude from stdin
x@ Exclude files listed in specified list file
y Assume Yes on all queries
