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Its very useful when you do not have control over name servers and need to check DNS configuration directly, right after change. You will not need to wait for DNS propagation to verify if all records were configured properly by vendors of name servers.
It suspends to RAM: you always need your batteries for the RAM but it saves time as there is no need to slowly archive everything on your hard disk.
It works fine with me but if anyone has a nicer way, please contribute.
Make a signature.
Encrypt for user id name.
This is the quick and dirty alternative ;)
The whole file will be emptied, this is equal to /dev/null > ~/.ssh/known_hosts
to unload Daemon, use: launchctl unload /Library/LaunchDaemons/.plist
eliminates "l" and "o" characters change length by changing 'x' here: cut -c 1-x
Values will depend on the driver and the hardware specifics, so you need to refer to your driver documentation for proper interpretation of those values.
Very simple and useful, you need to change the word "directory" for your directory
This deals nicely with files having special characters in the file name (space ' or ").
Parallel is from https://savannah.nongnu.org/projects/parallel/
The preferred way for scripts (and easier to parse)
gets the last number of the mac address to use it for other stuff
I alias this as "tach":
alias tach='screen -x `screen -ls | grep Detached | cut -c -10`'
If you have several detached sessions it will just grab the first one. If you're running nested screens you can open new outer windows and run tach repeatedly to grab all the detached sessions into that one.
Kudzu is available on CentOS, used for configuring and detecting new hardware device installed, is also usefull for device listing.