Commands by zubair (1)

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Create a 5 MB blank file via a seek hole
Similar to the original, but is much faster since it only needs to write the last byte as zero. A diff on testfile and testfile.seek will return that they are the same.

cat a file backwards
Or "tail -r" on Solaris.

format txt as table

Check the package is installed or not. There will show the package name which is installed.
The ^python$ is a package name patten. You can change whatever you want.

move you up one directory quickly
Alias a single character 'b' to move to parent directory. Put it into your .bashrc or .profile file. Using "cd .." is one of the most repetitive sequence of characters you'll in the command line. Bring it down to two keys 'b' and 'enter'. It stands for "back" Also useful to have multiple: alias b='cd ../' alias bb='cd ../../' alias bbb='cd ../../../' alias bbbb='cd ../../../../'

Limit the transfer rate of a pipe with pv
-L RATE, --rate-limit RATE Limit the transfer to a maximum of RATE bytes per second. A suffix of "k", "m", "g", or "t" can be added to denote kilobytes (*1024), megabytes, and so on. It must be an integer.

Install pip with Proxy
Installs pip packages defining a proxy

A very quick and slick fork bomb. Handle with care. Don't run on production please...

list files recursively by size

for loop with leading zero in bash 3


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