UNIX: How to Automate SSH Login

Yesterday, I was working on some shell script piece for my project and I came across a situation where I have to copy some files from one server to another using ‘scp’ command and also some time have to execute some command on other server.¬† One requirement was we don’t need to pass the password of functional id inside the script.

User should be able to login to other server without password using command¬† “ssh -l username remotehost”.

For this I used SSH public key based authentication as below:-

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Count lines of multiple similar files in unix

In continuation to my earlier post regarding concatenation similar files into one. I am writing this post to demonstrate counting lines of similar kind of files in a given directory and sub-directory.

Below command will find all the logs with given name pattern inside the directory including sub directories and then WC will count it’s lines and display on screen in total.

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