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Recompress all .gz files in current directory using bzip2 running 1 job per CPU core in parallel

Currency Conversion
eg: currency_convert 1 usd inr

check open ports (both ipv4 and ipv6)
While `lsof` will work, why not use the tool designed explicitly for this job? (If not run as root, you will only see the names of PID you own)

Resume a partially copied file

Find the package that installed a command

Counts number of lines (in source code excluding comments)
I took java to make the find command simpler and to state that it works for any language supported by cpp. cpp is the C/C++ preprocessor (interprets macros, removes comments, inserts includes, resolves trigraphs). The -fpreprocessor option tells cpp to assume the input has already been preprocessed so it will only replace comment lines with blank lines. The -L 1 option tells xargs to launch one process for each line, indeed cpp can only process one file at the time...

wget with resume
I couldn't find this on the site and it's a useful switch. Great for large files.

Debug how files are being accessed by a process
Instead of looking through `lsof` results, use inotifywait!

Echo the latest commands from commandlinefu on the console
Self-referential use of wget.

List only executables installed by a debian package
Safe for whitespaces in names.


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