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Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

check open ports without netstat or lsof

Docker: Remove all exited docker container

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Comparison between the execution output of the last and penultimate command
Useful for checking if there are differences between last and penultimate command.

shell function to make gnu info act like man.
For those who hate navigating info pages, a shell function which will dump the contents to stdout, then page it through less, thus acting like 'man'.

Hypnosis
rather don't depend on those sleepin'pills http://en.wikipedia.org/wiki/Counting_sheep

pretend to be busy in office to enjoy a cup of coffee
using seq inside a subshell instead of a bash sequence to create increments.

ps a process keeping the header info so you know what the columns of numbers mean!
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1828 0.0 0.0 5396 476 ? Ss 2008 0:00 /usr/sbin/sshd

list block devices
Shows all block devices in a tree with descruptions of what they are.


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