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Leap year calculation

Your GeoIP location on Google Maps

return external ip
I dont have curl or links installed, so I use wget with write file as standard out.

Trim linebreaks

File rotation without rename command
Rotates log files with "gz"-extension in a directory for 7 days and enumerates the number in file name. i.e.: logfile.1.gz > logfile.2.gz I needed this line due to the limitations on AIX Unix systems which do not ship with the rename command.

Mutt - Change mail sender.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Read a tcpdump file and count SYN packets to port 80, Order column by destination.

Watch the progress of 'dd'
dcfldd is a forensic version of dd that shows a process indicator by default.

strips the first field of each line where the delimiter is the first ascii character


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