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Rename files in batch

Trim png files in a folder
That should be a short as it can get.

Find and copy files from subdirectories to the current directory

Install pip with Proxy
Installs pip packages defining a proxy

check open ports without netstat or lsof

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

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"

Close specify detached screen
-X Send the specified command to a running screen session. -S Option to specify the screen session if you have several screen sessions running. $screen -ls for listing current screens and its sessionname

find files ignoring .svn and its decendents
for when find . -print | grep -v .svn | xargs doesnt cut it.

floating point operations in shell scripts
using bc is for sissies. dc is much better :-D Polish notation will rule the world...


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