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"Spend enough time on the command line and you'll eventually want to do many tasks…that take some intricate commands…repeatedly. A good example of this, is making thumbnails of photos. Basically, our workhorse of this script is not ImageMagick (which provides convert, identify and mogrify), but the for loop in bash itself. Ready? Grab your pen-knife and let's whittle out a script:"

"Bash is the default user shell in most Linux distributions. In case of incidents affecting a UNIX server, they are chances that a Bash shell will be involved. Bash keeps an history to help the user to search (and reuse) his last commands:"

" Few days ago, I came across a Centos 7 32-bit distro and I felt the desire to test it on an old 32-bit machine. After booting I realized that it had a bug and it was loosing the network connection, which I had to turn it "up" manually every time after boot. So, the question was how could I set a script doing this job, running every time I boot my machine?"