Tips &Tricks

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su: Authentication Failure

Instead of su use sudo to become root : >sudo -i root account is disabled by default in Ubuntu, so there is no root password associated with it. Use the exit command to logout...

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A telnet to a server

telnet <ip-address> <port-number> telnet <name-of-the-server> <port-number> Most of the time people check connectivity via ping <ip-address> But ping command listens on other ports than you expect. Hence, you might get response back from server...

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Find hostname in mac

Run the following command in your terminal. echo $HOSTNAME It is the simplest way to find the hostname in MAC from your terminal.

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Error: listen eacces

Did you try running your application on port# < 1024 and faced the following error? Error: listen EACCES It means you do not have enough permission to listen on port# < 1024. If you...