Saturday, May 4, 2019

CRON JOBS in Linux


CRON JOBS in Linux
 
CRON jobs mean scheduled tasks / functions in Linux such as clearing and deleting of redundant files at a timed interval.
 
These are generally meant for heavy duty servers with shared resources and not for single user desktops.
 
Linux is configured to do certain jobs at a particular time.

CRON a short term for time (origin from Chronological).
 
If one is new to Linux one should not fiddle with theses scheduled tasks for fun.
 
They are there to ease your jobs and not to burden YOU by themselves.
 
There was an article that question whether one should  run / not run the computer 24 hours.
 
The answer is YES 24/7 for Linux.
 
Some jobs are scheduled after midnight as a default and the CRON job gets clogged up, if the computer is switched off before midnight.
 
If your work is light at least twice a week let it run overnight so that in the morning it is ready with prime condition.
 
I have my own way of cleaning up and never changed a scheduled and default CRON configuration.
 
A single wrong configuration file might slow your computer.
 
If you a newbie and no understanding please do not fiddle with Linux defaults.

Beachbeat also do cleaning up jobs.

Only run it overnight once or twice a week,
 
Do not confuse with midnight commander.
It is a file manager.

My Learning Curve of Debian 5 to Current 9.9.0


My Learning Curve of Debian 5 to Current 9.9.0
My Learning Curve of Debian 6 to Current 9.9.0 was not smooth but with lot of hiccups but it was worth all the same.
I am writing this while waiting for Debian to be installed on a laptop.
I erased the Windows for good (laptop) but it did not allow me to mount a Linux distributions.
The current UEFI of Microsoft was created to ban dual booting.

Sinister and a sadistic ploy and the ESP boot partition is filled with a batch of Microsoft secretive BIG Virus Package.

Even Debian could not bypass this strategic ploy.

But I found a way.

It is Open Solaris in TrueOs that ruthlessly eliminated the ESP partition from ROOT to the RUMP of the partition table and let me use TrueOs.
It created TrueOs version of ESP partition to boot.
The TrueOs is for developers' item and I found a way to delete its TANK partition and install Debian.

Since TANK partition cannot be resized, I had to devise my own solution without coexisting with the TrueOs.
Coming back to my difficult experience with Debian in my early days, I migrated to Mandriva, to Redhat to Open Solaris and finally settled down with TestStar’s PCLinux (Fullmonty) for my work.
These were 32 bit power hungry old computers with low RAM.

Come 64 bits I changed to Peppermint and Debian.
I erased all my paid Window’s versions for good.
I use Debian exclusively without any problem.

Even managed to make a USB stick for installation on a laptop.

When I have time I play with ElementaryOs, PinguyOS, PeppermintOs, Elive, Emmabantus and few more.
Since I now use Debian only I feel I should voluntarily retire from taking about other distributions from now onwards,
Sorry guys and girls (developers) other than Debian.
Keep up the good work.
Thank YOU.