Commands by ptarrant (0)

  • bash: commands not found

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Do a search-and-replace in a file after making a backup
sed already has an option for editing files in place and making backup copies of the old file. -i will edit a file in place and if you give it an argument, it will make a backup file using that string as an extension.

Rename files in batch

Install pip with Proxy
Installs pip packages defining a proxy

Perl Command Line Interpreter
Read, Evaluate, Print, Loop - REPL

View internet connection activity in a browser
The output of lsof is piped to txt2html which converts it to html. # Perl module HTML::TextToHTML needed

Show number of NIC's, ports per nic and PCI address

Alert on Mac when server is up
When run on a mac, this command will bring up a dialog box in the Terminal when server HOSTNAME first responds to a ping.

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.

make, or run a script, everytime a file in a directory is modified

Swap a file or dir with quick resotre
This lets you replace a file or directory and quickly revert if something goes wrong. For example, the current version of a website's files are in public_html. Put a new version of the site in public_html~ and execute the command. The names are swapped. If anything goes wrong, execute it again (up arrow or !!).


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