Get all lines in a big file containing some text:

cat filename  | egrep "141.71.45.20|159.205.92.236|171.33.185.210|"

Thanks to Günter!

dig domainname.tld

To really see all DNS entries for the domain, add option ANY:

dig domainname.tld ANY

Fast and easy if the linenumber is known:

find . -type f -not -iname "*.jpg" -not -iname "*.jpeg" -not -iname "*.gif" -not -iname "*.png" -not -iname "*.pdf"

Useful!

Split the file into multiple files at every 3rd line . i.e, First 3 lines into F1, next 3 lines into F2 and so on:

$ awk 'NR%3==1{x="F"++i;}{print > x}' filename

Not a random node filter, but to display one of several images of a node in any list or display. Useful for several of my clients but not standard.

First of all:

Create a simple user with ssh login:

Change permission of directories

cd /var/files/test
find -type d -exec chmod 0777 {} \;

function getNumPagesInPDF($PDFPath = NULL)
 {
 $stream = fopen($PDFPath, "r");
 $PDFContent = fread ($stream, filesize($PDFPath));

Use 'ALT+SHIFT+A' et voilá ...