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

Print a random 8 digit number

Drop all tables from a database, without deleting it
Uses two comands, requieres mysqldump, but works as expected.

List docker volumes by container

show the date every rpm was installed
the newest rpms are at the top; individual packages can also be queried this way: rpm --last -q package

top svn committers (without awk)
list top committers (and number of their commits) of svn repository. in this example it counts revisions of current directory.

Set executable permissions on a file under Subversion
This avoids the "chmod +x filename" after performing a check out or export. From http://snipplr.com/view/5277/set-executable-permissions-on-a-file-under-subversion/

Send a binary file as an attachment to an email
The uuencode utility will encode your file so that it can be sent as an attachment to an email. It is part of the sharutils package in RHEL/CentOS/Fedora.

set a reminder for 5 days in the future
setup for reminder in 5 days, added the date in the future. To run a job at 4pm three days from now, you would do at 4pm + 3 days, to run a job at 10:00am on July 31, you would do at 10am Jul 31 and to run a job at 1am tomorrow, you would do at 1am tomorrow.

Backup a file with a date-time stamp
$ buf myfile.txt This is useful when you are making small but frequent changes to a file. It keeps things organised and clear for another administrator to see what changed and at what time. An overview of changes can be deduced using a simple: $ ls -ltr


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