The first entry ( Host lab) sets the options to be used for the server denoted as ' lab' the address is 10.1.1.42, the user name is ' bender', it should use public key authentication and the key is the file ' ~/.ssh/id_rsa_lab'. IdentityFile ~/.ssh/id_rsa_lab #Options applicable to all connections Host * ForwardAgent yes The following is a simple configuration file: Host lab HostName 10.1.1.42 User bender PubkeyAuthentication yes
![ssh copy id man ssh copy id man](https://kofler.info/wp-content/uploads/win-ssh-client.png)
As usual, comments are entered by ‘#’ symbol and blank lines are ignored. If you want to specify global options for all the connections use the '*' wildcard, that is, ' Host *'. Actually, it is not a name but a pattern so you could define entries like 'Host lab*', more on this in a second. The ssh configuration file is divided in entries, each entry sets the specific options for a given server and it starts by the keyword ' Host' followed by a name, that name will be the alias of the connection that you will use to invoke it. The same principle applies inside each configuration file and therefore global settings should be always located at the end of the files.
![ssh copy id man ssh copy id man](https://www.howtoforge.de/images/wie-man-jenkins-master-und-slave-auf-ubuntu-einrichtet-1804-lts/upload-4.jpg)
Having that in mind it is easy to understand that command line arguments override the settings of the personal ssh configuration file ( ~/.ssh/config) which in turn also override the settings provided by the global configuration file ( /etc/ssh/ssh_config). Once a parameter is set its value will not change, in other words, if the same option is given multiple times with different values, ssh will use the first value and ignore the rest.
![ssh copy id man ssh copy id man](https://ml1jfqug5h0e.i.optimole.com/7frTICM-5LwtoLCG/w:auto/h:auto/q:90/https://sapsan-pentesting.com/wp-content/uploads/2021/04/Pasted-image-20210429115823.png)
All those options could be saved in the ssh configuration file and avoid typing them, so we can simply execute something like:Īnd so it begins. In the above example we are saying to ssh to connect to ' 10.1.1.42' using the username ' bender' and the keyfile ' ~/.ssh/id_rsa_lab.pub'.
#Ssh copy id man how to
In this post we’ll see how to reduce our number of keystrokes when connecting through ssh by the usage of configuration files.Īs you know, ssh accepts many input parameters and usually you will type them in the command line, for instance: Sure we all want to impress a newbie by typing long cryptic commands in a black screen and then say “I’m in”, but at the end of the day, let’s accept it, we don’t have many visitors except the little nephews who are lurking around trying to use our machines to surf porn. There is a time when being cool it is simply too much work.