Commands by rmwiseman (0)

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Analyze awk fields
translate and number lines is simpler and you use tr to choose your delimiter (eg for csv files)

Display which user run process from given port name
Display which user run process from given port name

statistics in one line
In this example, file contains five columns where first column is text. Variance is calculated for columns 2 - 5 by using perl module Statistics::Descriptive. There are many more statistical functions available in the module.

Show the date of easter
ncal -e shows the date of Easter this year. ncal -e YYYY shows the date of Easter in a given year. ncal -o works the same way, but for Orthodox dates.

Install pip with Proxy
Installs pip packages defining a proxy

scheduled jobs

Binary clock
Fun idea! This one adds seconds and keeps running on the same line. Perl's probably cheating though. :)

Sending a file over icmp with hping
you need to start a listening hping on the reciever: hping3 --listen 10.0.2.254 -I eth0 --sign MSGID1 then you can send your file: hping3 10.0.2.254 --icmp --sign MSGID1 -d 50 -c 1 --file a_file

Count threads of a jvm process
if you have problem threads problem in tomcat

Transform a portrait pdf in a landscape one with 2 pages per page
This is an example of the usage of pdfnup (you can find it in the 'pdfjam' package). With this command you can save ink/toner and paper (and thus trees!) when you print a pdf. This tools are very configurable, and you can make also 2x2, 3x2, 2x3 layouts, and more (the limit is your fantasy and the resolution of the printer :-) You must have installed pdfjam, pdflatex, and the LaTeX pdfpages package in your box.


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