Tip: Resume Session with screen

Rai    Linux     command, Linux, screen, session, terminal, tip

Network infrastructure is the backbone of your computer’s connectivity and therefor should be stable, reliable and very little, if no downtime. If it isn’t the case, can you imagine getting disconnected from the server while you are remotely running your scripts via ssh? Not only that the script has to be re-run, but might damage other important files as well.

If you are in a situation where you need something to remain connected to the server, you can use screen. screen is a full-screen window manager that multiplexes a physical terminal between several processes typically interactive shells). When screen is called, it creates a single window with a shell in it (or the specified command) and then gets out of your way so that you can use the program as you normally would. Then, at any time, you can create new (full-screen) windows with other programs in them (including more shells), kill existing windows, view a list of windows, turn output logging on and off, copy-and-paste text between windows, view he scrollback history, switch between windows in whatever manner you wish, etc. All windows run their programs completely independent of each other. Programs continue to run when their window is currently not visible and even when the whole screen session is detached from the user’s terminal. read more

Tip: How to Schedule Tasks

Rai    Linux, Tips     cron, howto, Linux, linux command, ls, schedule task, tip

If you are using Windows, you are probably familiar with task scheduler to schedule certain tasks automatically. With Linux, tasks can be done on scheduled dates with cron.

cron is the service that works like task scheduler in Windows and can be used if you want to automate repetitive tasks like generating reports everyday or virus scanning. cron is handled by the cron daemon or crond, which should be running if you want your scheduled tasks to run.
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Tip: How to Delete Files with Special Characters

Rai    Linux, Tips     command, dash, delete, Linux, rm, special character, tip

How to delete files with dash or any special character?

Have you tried to delete a who-knows-where-it-came-from file which has a special character like preceded with dash or question mark? I bet that when you tried to delete it, you got something like this:
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Ultimate Linux Cheat Sheets

Rai    How-To's, Linux     commands, guide, help, Linux, list, newbie, tip

If you are in dire need of SOS because of that little command that is stuck at the tip of your tongue or you are having a huge case of memory gap, fret not. Here is a quick link to a massive list of Unix/Linux cheat sheets. One link points to http://www.tuxfiles.org/linuxhelp/linuxcommands.html which profiles a list of Linux commands that are newbie friendly.

List too long for you? You can try the Linux command apropos <keyword>. This command searches the whatis database for strings that matches your keyword. Let’s say you forgot the command to copy a file (uh-oh) so we go like this:

# apropos copy

# cp (1) – copy files and directories
# cp (1p) – copy files

Hey there it is! So we got cp. You can now use man command to check if cp is really what you are looking for. Google is also a neat tool if internet access is readily available.