In my opinion, even a simple a.out on the terminal holds complete information about the file being in the current directory. Reiterating it with ./a.out seems superfluous.
Why do we need to specify that the file is in current directory to execute it?
I have a Server where Calculations are being executed, they take sometimes days to finish. I would like to send an e-mail when the job is finished, maybe through a script or even with the |.
Before getting to the technical/command part I'd like to know what are the concepts managed to do this.
I've read many blogs, even here in AskUbuntu, but they were from 2012, or 2014, suggesting sendmail, mutt, postfix, at... and many answers said "that's deprecated", "is no longer used", etc. or at least that's what I've understood.
Thanks.
I'm trying to understand what the below piece of shell script is doing. I know that exec without any arguments redirect the output of the current shell but am not able to understand what the below command does:
exec 1>/var/opt/log/my_logs/MYPROG_`date '+%Y%m%d_%H%M%S'`.log 2>&1
I am trying to edit the reboot command to echo a message to the user, but the command itself located in /sbin is compiled. Is it possible to edit the command and have it print something out when the user types reboot?
While trying my hand at writing some bash scripts I've come across various usage of the -exec parameter. In my context, I'm using it after the find command.
This guide states to use {} /; after the exec in order to pass the file name and to escape the ; so that command properly terminates.
This forum post shows the use of '{}' ';' instead of {} /;.
I tried out both methods on Ubuntu 11.04 and only the one with the single quotes is working correctly. Is there a difference between Linux versions which causes this? Are they interchangeable? Is one preferred over the other?