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Find the package that installed a command

Search for in which package the specified file is included.

Ping sweep without NMAP
Waits for all pings to complete and returns ip with mac address

Send an email from the terminal when job finishes
Might as well include the status code it exited with so you know right away if it failed or not.

Transfer Entire recursive from one host to another. Only copies files that are newer or do not exist
From opposite host To copy remote to local rsync -aE -e "ssh -pPortnumber" user@hostA:directory target_dir

Upgrading packages. Pacman can update all packages on the system with just one command. This could take quite a while depending on how up-to-date the system is. This command can synchronize the repository databases and update the system's packages.
Warning: Instead of immediately updating as soon as updates are available, users must recognize that due to the nature of Arch's rolling release approach, an update may have unforeseen consequences. This means that it is not wise to update if, for example, one is about to deliver an important presentation. Rather, update during free time and be prepared to deal with any problems that may arise. Pacman is a powerful package management tool, but it does not attempt to handle all corner cases. Read The Arch Way if this causes confusion. Users must be vigilant and take responsibility for maintaining their own system. When performing a system update, it is essential that users read all information output by pacman and use common sense. If a user-modified configuration file needs to be upgraded for a new version of a package, a .pacnew file will be created to avoid overwriting settings modified by the user. Pacman will prompt the user to merge them. These files require manual intervention from the user and it is good practice to handle them right after every package upgrade or removal. See Pacnew and Pacsave Files for more info. Tip: Remember that pacman's output is logged in /var/log/pacman.log.

Go up multiple levels of directories quickly and easily.
Change to your taste. Much quicker than having to add 'cd' every time. Add it to your .bashrc or .bash_profile.

Delete all non-printing characters from a file
tr has some predefined sets of characters that are more convenient to use than characters codes

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Make changes in .bashrc immediately available


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