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ssh的配置

网管不在，需要自己配ssh，几年前配过，早就忘了，今天重新梳理了一遍。

为防止几年后再去网上乱找相关的资料，谨记于此。

1.安装(以ssh-3.2.5为例,root身份):

先删除openssh
(adv2)

rpm -e openssh-clients-3.1p1-2
rpm -e openssh-askpass-gnome-3.1p1-2
rpm -e openssh-askpass-3.1p1-2
rpm -e openssh-server-3.1p1-2
rpm -e openssh-3.1p1-2

(adv3)

rpm -e netdump-0.6.10-2
rpm -e desktop-printing-0.1.10-15.1
rpm -e kdebase-3.1.3-5.2
rpm -e openssh-askpass-gnome-3.6.1p2-18
rpm -e openssh-askpass-3.6.1p2-18
rpm -e openssh-server-3.6.1p2-18
rpm -e openssh-clients-3.6.1p2-18
rpm -e openssh-3.6.1p2-18

开始安装

gunzip ssh-3.2.5.tar.gz
tar xvf ssh-3.2.5.tar
cd ssh-3.2.5
./configure
make
make install

随系统自动启动
(Linux):
cp ssh-3.2.5/startup/linux/redhat/sshd2 /etc/init.d/sshd2.init
cd /etc/rc2.d
ln -s ../init.d/sshd2.init S99sshd2
cd /etc/rc3.d
ln -s ../init.d/sshd2.init S99sshd2

(FreeBSD):
cp ssh-3.2.5/startup/linux/redhat/sshd2 /usr/local/etc/rc.d/sshd2.sh
至此,SSH安装完毕

2.本地机自动登陆远程机(普通用户,如webdev)
在本地机:
cd .ssh2
ssh-keygen2 -P
cd
cd .ssh2
echo "IdKey id_dsa_2048_a" > identification

将id_dsa_2048_a.pub上传至FTP,可更名为pub01_2048.pub
(多个pub同样,id_dsa_2048_a.pub更名以便区分)

在远程机:
cd
cd .ssh2

从FTP下载pub01_2048.pub
echo "Key pub01_2048.pub" > authorization

多个PUB则下载所有的pub key
然后编辑$HOME/.ssh2/authorization,文件内容类似于:
Key pub01_2048.pub
Key pub02_2048.pub
~
Key pubxx_2048.pub

配置完毕,从本地机以该用户身份可以直接登陆而不需要输入口令
$ssh user@remote_host
($ssh -l user remote_host)
为便于配置其它前台机器,将第一台的.ssh2目录压缩上传FTP,
然后其它机器下载解压到同样目录即可.

常见问题:
1、删除openssh相关rpm时提示某个包需要这个包
先删除提示中出现的rpm包。

Host type................: i686-pc-linux-gnu
CC.......................: gcc
CPPFLAGS.................:
CFLAGS...................: -D_GNU_SOURCE -g -O2 -Wall -Wno-unknown-pragmas -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
LDFLAGS..................:
LIBS.....................: -lm -lbsd -lnsl -lbsd -lcrypt -lutil -lncurses -ltermcap -ldl -lcrypt -lnsl -L/usr/local/lib -lutil
X includes...............: NO
X libraries..............: NO

Debug enabled............: light
IPv6 support.............: yes
RSA support..............: yes
SSH1 internal emulation..: yes
SSH1 fallback capability.: no
Kbd-interactive in server: yes
Submethods.............: pam passwd plugin
Kbd-interactive in client: yes
PAM support in server....: yes
PAM support in client....: yes
SecurID support in server: no
SecurID support in client: yes
Kerberos5 support........: no
TCP Wrappers support.....: no
Terminal capability lib..: terminfo
X11 SECURITY extension...: no

PTY Type.................: ptmx

Installation prefix......: /usr/local
bin directory............: /usr/local/bin
sbin directory...........: /usr/local/sbin
man directory............: /usr/local/man
ssh2 etc directory.......: /etc/ssh2
PID-file directory.......: default

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