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Use md5sum to check your music and movie files. Also use diff.
This is a beginning script. You can create a file with > filename. You can also use diff to compare output run at different times to verify no change in your files. I apologize in advance if this is too simple. For some it should be a start.

Disable system bell in an X session
Execute this command in a terminal to disable the system-bell during X-session lifetime.

psgrepp
grep по ps aux

Prefix every line with a timestamp

Compare a remote file with a local file
Useful for checking if there are differences between local and remote files.

check open ports without netstat or lsof

Mount Fat USB with RWX
after that, you can launch bash script in your usb drive in FAT32.

Show what PID is listening on port 80 on Linux

count how many cat processes are running

Backup with versioning
Apart from an exact copy of your recent contents, also keep all earlier versions of files and folders that were modified or deleted. Inspired by EVACopy http://evacopy.sourceforge.net


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