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Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested

change up n directories
Change n directories up, without parameters change one up

Upgrade all perl modules via CPAN

Hiding password while reading it from keyboard
Allow to read password in a script without showing the password inserted by the user

This is how you should push a string in a command's stdin.
Don't do this: $echo word | command Using a bash "here strings" and "here documents" look leeter than piping echo into the command. Also prevents subshell execution. Word is also expanded as usual.

Length of longest line of code
Here's an awk version.

Get a list of Mageia Linux mirrors providing rsync connectivity for Mageia 4 release
Need to find a Mageia Linux mirror server providing Mageia 4 via rsync? Modify the "url=" string for the version you want. This shows i586 which is the 32bit version. If you want the 64bit version it is: url=http://mirrors.mageia.org/api/mageia.4.x86_64.list; wget -q ${url} -O - | grep rsync:

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

Undo
Ctrl+_

Display total Kb/Mb/Gb of a folder and each file


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