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Manipulate the metadata when the photo was taken, this will shift with +15hours + 30min

get the ascii number with bash builtin printf

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Return threads count of a process
Source: http://superuser.com/questions/49408/how-do-i-monitor-or-view-the-thread-count-of-a-certain-process-on-aix

Insert a line at the top of a text file without sed or awk or bash loops
Just use '-' to use STDIN as an additional input to 'cat'

Watch how many tcp connections there are per state every two seconds.
slighty shorter

Configuring proxy client on terminal

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Convert PDF to JPG
(relies on 'imagemagick') This command will convert all .pdf files in a directory into a 800px (wide or height, whichever is smaller) image (with the aspect ratio kept) .jpg. If the file is named 'example1.pdf' it will be named 'example1.jpg' when it is complete. This is a VERY worthwhile command! People pay hundreds of dollars for this in the Windows world. My .jpg files average between 150kB to 300kB, but your's may differ.

Run the last command as root
this command also can run the last command as root what's more, sudo !-2 can run the second last command as root , and so on


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