SSH without PassWord

Steps:

1. On the client run the following commands:

   $ mkdir -p $HOME/.ssh $ chmod 0700 $HOME/.ssh $ ssh-keygen -t dsa -f $HOME/.ssh/id_dsa -P '' 

   This should result in two files, $HOME/.ssh/id_dsa (private key) and $HOME/.ssh/id_dsa.pub (public key).

2. Copy $HOME/.ssh/id_dsa.pub to the server.

3. On the server run the following commands:

   $ cat id_dsa.pub >> $HOME/.ssh/authorized_keys2 $ chmod 0600 $HOME/.ssh/authorized_keys2 

   Depending on the version of OpenSSH the following commands may also be required:

   $ cat id_dsa.pub >> $HOME/.ssh/authorized_keys $ chmod 0600 $HOME/.ssh/authorized_keys 

   An alternative is to create a link from authorized_keys2 to authorized_keys:

   $ cd $HOME/.ssh && ln -s authorized_keys2 authorized_keys 

4. On the client test the results by ssh'ing to the server:

   $ ssh -i $HOME/.ssh/id_dsa server 

5. (Optional) Add the following $HOME/.ssh/config on the client:

   Host server          IdentityFile ~/.ssh/id_dsa 

   This allows ssh access to the server without having to specify the path to the id_dsa file as an argument to ssh each time.

Linux : Delete / Move / Copy remote Files

I am posting this as I had this issue and had a hard time to figure out the solution.

To delete any files from the remote machine we can use the following -:

 ssh -l psadmin -q xx.xx.xxx.xxx rm /xxx/xxxx/saurabh/1/asjdhl.txt

To Move files 

 ssh -l psadmin -q xx.xx.xxx.xxx mv /xxx/xxxx/saurabh/1/asjdhl.txt  /opt/customer/saurabh/2/

You will be prompted for a password though, however you may want to write a simple shell to do the same.

---saurabh