The telnet is one of the most useful networking commands, which is used to check if a server is listening on a particular port on the remote host, but it's a little bit tricky to use, especially, if you are not using it daily. Though I have used telnet before, but when I use it after a long time, I actually forget how to close the telnet terminal and how to get out of it. I tried every possible command I can think of which is used to close, cancel a command, or exit from VIM editor in UNIX, e.g. Ctrl + C, quit, exit, q! and even the escape character '^]', only to realize that nothing is working. I finally managed to come out from telnet command prompt after a bit of struggle, and trial and error but I was surprised how difficult it can be to use one of the top 10 networking commands in UNIX.
I use Eclipse IDE extensively to write Java programs for testing and example purpose, but when I copy those program in any text editors e.g. VIM, Notepad, TextPad or Edit plus, the indentation goes weird. I see a lot of white spaces which makes the program wider than expected. This happens because when you copy Java program from Eclipse to a text editor, tabs are converted to spaces and different editor has the different settings of tabs. UNIX text editors prefer tab is 8 spaces, Windows text editors, and IDEs e.g. Eclipse treat tabs as 4 spaces. If you are like many Java programmer who is more comfortable with space than tabs because they give a true sense of spacing, you can always change the Java editor settings to use space instead of tabs in Eclipse. In this article, I am going to share how to make Eclipse uses spaces instead of tabs for Java editor, which you use while writing Java programs.