最近有些客户希望升级openssh和ssl，发现centos默认的库无法直接升级。于是制作了下面的升级命令，分别大家使用。CentOS下用YUM升级OpenSSH和OpenSSL，一行命令搞定:
wget http://www.ctohome.com/linux-vps-pack/webmin/upgrade-openssh.sh;sh upgrade-openssh.sh;
升级成功后会自动重启ssh服务，效果图如下：
Stopping sshd: [ OK ]
Starting sshd: [ OK ]
========== www.CTOHome.com ============
========== SSH Version ============
OpenSSH_5.5p1, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
[root@225845 ~]# ssh -V
OpenSSH_5.5p1, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
如果你发现还是ssh4.x版本，而且提示有错误：
openssh-clients-5.5p1-24.el5.i386 from centalt has depsolving problems
--> Missing Dependency: libedit.so.0 is needed by package openssh-clients-5.5p1-24.el5.i386 (centalt)
Error: Missing Dependency: libedit.so.0 is needed by package openssh-clients-5.5p1-24.el5.i386 (centalt)
You could try using --skip-broken to work around the problem
那么，先需要安装libedit0类库，如下：
centos 5.x 32位用如下命令安装
rpm -Uvh ftp://ftp.pbone.net/mirror/atrpms.net/el5-i386/atrpms/stable/libedit0-3.0-1.20090722cvs.el5.i386.rpm
或
rpm -Uvh https://wangxingcs.com/libedit0-3.0-1.20090722cvs.el5.i386.rpm
centos 5.x 64位用如下命令安装
rpm -Uvh ftp://ftp.pbone.net/mirror/atrpms.net/el5-x86_64/atrpms/stable/libedit0-3.0-1.20090722cvs.el5.x86_64.rpm
其他系统，请在这里找对应版本：
http://rpm.pbone.net/index.php3/stat/3/srodzaj/1/search/libedit.so.0
PS：如果安装libedit0类库遇到
ldconfig: /usr/lib/libmysqlclient.so.16 is not a symbolic link
ldconfig: /usr/lib/libmysqlclient_r.so.16 is not a symbolic link
提示两个so文件不是符号链接，这时再用ldconfig -v来查看两个文件链接的目标，分析之后重新链接
ln -sf /usr/local/mysql/lib/mysql/libmysqlclient_r.so.16 /usr/lib/libmysqlclient_r.so.16
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