CentOS下安装OpenSSH 5.8的三种方法【未测试】

CentOS下安装OpenSSH 5.8的三种方法

Category :
工作学习 / Tags :
centos,
linux,
openssh / Date :
2011.05.19 / 5,296 views /

　　CentOS 5.X自带的OpenSSH版本很低，还是4.3P2的。不支持SFTP Chroot功能。下面总结了三种升级到新版本的方法：

　　为了升级安全，可先启用telnet服务，默认系统是没有启用这个服务的。

　　启用Telnet远程管理

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vi /etc/xinetd.d/krb5-telnet   # default: off # description: The kerberized telnet server accepts normal telnet sessions, \ # but can also use Kerberos 5 authentication. service telnet { flags = REUSE socket_type = stream wait = no user = root server = /usr/kerberos/sbin/telnetd log_on_failure += USERID disable = no }

　　修改disable为no，默认为yes，即禁用telnet服务。修改为no,即表示启用telnet服务。

　　重启xinetd，开启Telnet服务

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service xinetd restart   停止 xinetd： [确定] 启动 xinetd： [确定]

　　检查Telnet是否正常启动

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netstat -tnlp | grep :23   tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN 20938/xinetd

　　注意：为了安全，Telnet是不能以root直接登陆的。以普通用户登录后再su切换root。SSH升级成功后，记得关闭telnet服务。

　　方法一：源码包编译安装

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wget http://mirror.internode.on.net/pub/OpenBSD/OpenSSH/portable/openssh-5.8p2.tar.gz tar xvf openssh-5.8p2.tar.gz cd openssh-5.8p2 ./configure --prefix=/usr --sysconfdir=/etc/ssh make make install

　　上面的方法会覆盖原版本的文件，make install覆盖/etc/ssh下配置文件时可能会报错。这时删掉/etc/ssh下的原配置文件，再make install一次就可以了

　　建议安装还是换个路径比较好，特别是线上服务器。下面给出的是官方给出的几种方案，根据自己情况调整吧！

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To install OpenSSH with default options:   ./configure make make install   This will install the OpenSSH binaries in /usr/local/bin, configuration files in /usr/local/etc, the server in /usr/local/sbin, etc. To specify a different installation prefix, use the --prefix option to configure:   ./configure --prefix=/opt make make install   Will install OpenSSH in /opt/{bin,etc,lib,sbin}. You can also override specific paths, for example:   ./configure --prefix=/opt --sysconfdir=/etc/ssh make make install   This will install the binaries in /opt/{bin,lib,sbin}, but will place the configuration files in /etc/ssh.

　　方法二：编译RPM包安装

　　用上面下载的源码包来自己编译生成RPM包。这个方法相对比较麻烦，因为有不少和X相依的库需要安装。

　　安装相依包，我的系统上就只差这些。如果你的编译时报错，请根据报错装上其它相依包。

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1 2	yum -y install libX11-devel libXt-devel gtk2-devel wget http://ftp.riken.jp/Linux/momonga/6/Everything/SOURCES/x11-ssh-askpass-1.2.4.1.tar.gz

　　x11-ssh-askpass is a lightweight passphrase dialog for OpenSSH or other open variants of SSH. In particular, x11-ssh-askpass is useful with the Unix port of OpenSSH by Damien Miller and others, and Damien includes it in his RPM packages of OpenSSH.

　　x11-ssh-askpass uses only the stock X11 libraries (libX11, libXt) for its user interface. This reduces its dependencies on external libraries (such as GNOME or Perl/Tk).

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tar xvf openssh-5.8p2.tar.gz cp openssh-5.8p2/contrib/redhat/openssh.spec /usr/src/redhat/SPECS/ cp openssh-5.8p2.tar.gz /usr/src/redhat/SOURCES/ cp x11-ssh-askpass-1.2.4.1.tar.gz /usr/src/redhat/SOURCES/ rpmbuild -bb /usr/src/redhat/SPECS/openssh.spec

　　编译成功后生成的OpenSSH安装包

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cd /usr/src/redhat/RPMS/`uname -i` ls -l   openssh-5.8p2-1.i386.rpm openssh-askpass-5.8p2-1.i386.rpm openssh-askpass-gnome-5.8p2-1.i386.rpm openssh-clients-5.8p2-1.i386.rpm openssh-debuginfo-5.8p2-1.i386.rpm openssh-server-5.8p2-1.i386.rpm

　　安装RPM包，升级OpenSSH到5.8p2

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1	rpm -Uvh openssh*rpm

　　验证SSH的新版本

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ssh -v   OpenSSH_5.8p2, OpenSSL 0.9.8b 04 May 2006

　　方法三：通过rpmfind.net直接下载编译好的rmp包是最简单的方法。

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OpenSSH 5.8p2 32位   wget ftp://rpmfind.net/linux/fedora/development/rawhide/i386/os/Packages/openssh-server-5.8p2-1.fc16.1.i686.rpm wget ftp://rpmfind.net/linux/fedora/development/rawhide/source/SRPMS/openssh-5.8p2-1.fc16.1.src.rpm wget ftp://rpmfind.net/linux/fedora/development/rawhide/i386/os/Packages/openssh-askpass-5.8p2-1.fc16.1.i686.rpm wget ftp://rpmfind.net/linux/fedora/development/rawhide/i386/os/Packages/openssh-clients-5.8p2-1.fc16.1.i686.rpm

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OpenSSH 5.8p2 64位   wget ftp://rpmfind.net/linux/fedora/development/rawhide/x86_64/os/Packages/openssh-server-5.8p2-1.fc16.1.x86_64.rpm wget ftp://rpmfind.net/linux/fedora/development/rawhide/x86_64/os/Packages/openssh-5.8p2-1.fc16.1.x86_64.rpm wget ftp://rpmfind.net/linux/fedora/development/rawhide/x86_64/os/Packages/openssh-askpass-5.8p2-1.fc16.1.x86_64.rpm wget ftp://rpmfind.net/linux/fedora/development/rawhide/x86_64/os/Packages/openssh-clients-5.8p2-1.fc16.1.x86_64.rpm

　　安装RPM包，升级OpenSSH到5.8p2

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1	rpm -Uvh openssh*rpm

　　验证SSH的新版本

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ssh -v   OpenSSH_5.8p2, OpenSSL 0.9.8b 04 May 2006