~/.sshon all computers you want to use.
ssh-keygen -t dsa
~/.sshon your local computer, i.e. a directory
.sshin your home directory. You will be asked for the file name where to save the keys (answer with
return). After that you will be asked two times for a passphrase (i.e. a password). Remember that passphrase as you will be prompted for it later. Two file are generated:
id_dsacontains the private key and must be readable only by you.
id_dsa.pubis the public key.
authorized_keysdoens't exist already in the directory
~/.sshcreate a new empty file, i.e. execute:
cat ~/.ssh/id_dsa.pub >>~/.ssh/authorized_keys.
~/.ssh/authorized_keysto all remote computers you want to establish connections to in the future. This can be done in the following way:
scp ~/.ssh/authorized_keys Account@RemoteHost:~/.ssh/authorized_keys
rudolf@pluto: mkdir ~/.ssh rudolf@pluto: ssh-keygen -t dsa Generating public/private rsa key pair. Enter file in which to save the key (/home/rudolf/.ssh/id_dsa):RETURN Enter passphrase (empty for no passphrase):mypassword Enter same passphrase again:mypassword Your identification has been saved in /home/rudolf/.ssh/id_dsa. Your public key has been saved in /home/rudolf/.ssh/id_dsa.pub. The key fingerprint is: 27:5e:be:3e:26:aa:9f:8a:8c:2e:d9:01:c1:60:7b:a6 rudolf@pluto rudolf@pluto: touch ~/.ssh/authorized_keys rudolf@pluto: cat ~/.ssh/id_dsa.pub >>~/.ssh/authorized_keys rudolf@pluto: scp ~/.ssh/authorized_keys rudolf@pollux:~/.ssh/authorized_keys rudolf@pluto: scp ~/.ssh/authorized_keys rudolf@venus:~/.ssh/authorized_keys rudolf@pluto:If you have in the further process any problems and you feel it is better to start from scatch, remove the .ssh directory in your home directory and start again with the initialization procedure.
shyou may use another shell like
bash, ksh, csh, tcsh.All the following commands should be child processes of this newly created process, i.e. all commands should be started in this newly created shell. If your operating system allows to execute the window system under an ssh-agent, this should be the preferred way.
ssh [-l loginname] [ hostname | user@hostname ] [command]
ssh bryan@pc-200 \"ls -l\"
rudolf@pluto: ssh-agent sh rudolf@pluto: ssh-add Need passphrase for /home/rudolf/.ssh/id_dsa Enter passphrase for /home/rudolf/.ssh/id_dsa:mypassword Identity added: /home/rudolf/.ssh/id_dsa (/home/rudolf/.ssh/id_dsa) rudolf@pluto: ssh bryan@pc-200 bryan@pc-200:
This document describes ssh protocol version 2. There exists an older protocol named version 1 which uses different files etc.There are tools available (e.g. keychain) that handle the login process including startup of an ssh-agent etc. in a more comfortable way.