Commands by tersmitten (3)

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Recursively search and replace old with new string, inside every instance of filename.ext
This is a slightly modified version of http://www.commandlinefu.com/commands/view/4283/recursive-search-and-replace-old-with-new-string-inside-files (which did not work due to incorrect syntax) with the added option to sed inside only files named filename.ext

get all Amazon cloud (amazonws etc) ipv4 subnets

Monitor dynamic changes in the dmesg log.
Other logs can be monitored similarly, e.g. $ watch "tail -15 /var/log/daemon.log"

Copy one file to multiple files
Copies file.org to file.copy1 ... file.copyn

wget download with multiple simultaneous connections

execute command on all files of certain types excluding folders that match pattern

What is my ip?

Write comments to your history.
A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Connect via SSH to VirtualBox guest VM without knowing IP address
Booting the VM headless via VBoxHeadless requires knowledge of the VM's network in order to connect. Using VBoxManage in this way and you can SSH to the VM without first looking up the current IP, which changes depending on how you have your VM configured.

Copy data using gtar
It copies the entire current working directory to the destination directory with compression enabled.


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