Commands using cd (215)

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

check open ports without netstat or lsof

Fill up disk space (for testing)
Put into some file. No special purpouse, just for fun...

Find the process you are looking for minus the grepped one
As an alternative to using an additional grep -v grep you can use a simple regular expression in the search pattern (first letter is something out of the single letter list ;-)) to drop the grep command itself.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Alias for getting OpenPGP keys for Launchpad PPAs on Ubuntu
Makes it easy to add keys to new ppa sources entries in apt sources.list Now to add the key for the chromium-daily ppa: $ launchpadkey 4E5E17B5

Programmatic way to find and set your timezone

Recursive Line Count
We use `-not -name ".*"` for the reason we must omit hidden files (which unnecessary). We can only show up total lines like this: $ find * -type f -not -name ".*" | xargs wc -l | tail -1

How to secure delete a file
Instead, install apt-get install secure-delete and you can use: -- srm to delete file and directory on hard disk -- smem to delete file in RAM -- sfill to delete "free space" on hard disk -- sswap to delete all data from swap

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


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