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run last command with root
you will be sad after you run a command and find out it needs root, so you should run it again but with prefix sudo. so this line is to make it simple. just 'sudo !!'

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.

Takes and displays screenshot of Android phone over adb.
Dependencies on phone: adb access, screencap command, base64 command. Dependencies on computer: adb, sed, base64, display (from imagemagick, but can substitute other image viewer which reads from stdin). This should work around adb stupidies (i.e. that it replaces \n with \r\n) with base64.

Replace space in filename
This commands removes space from all the files with specific extension. I've specifed *.jpg as an example.

A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram

Sort on multiple dis-contiguous keys/fields (can even specify key number/field from the end)
Notes: 1) -n-1 means sort key is the last field 2) -l is important if each separate record is on a new line (usually so for text files) 3) -j tells msort not to create log file (msort.log) in the working directory 4) may need to install msort package. 5) msort does lot more. Check man msort

Compare two files side-by-side
I found out about this from Unix Power Tools, and thought it was pretty useful. Use the -w option to change the width of the output, and the -s option to suppress lines that are the same in both files.

Mortality Countdown
watch the seconds of your life tick away - replace YYYY-mm-dd HH:MM:ss w/ your birthtime.

pipe output to notify-send
Route output to notify-send to show nice messages on the desktop, e.g. title and interpreter of the current radio stream

List the size (in human readable form) of all sub folders from the current location


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