Commands by ceddi (11)

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Replicate a directory structure dropping the files
Here is how to replicate the directory structure in the current directory to a destination directory (given by the variable DESTDIR), without copying the files.

Print current runlevel
Prints current runlevel and system start time. On older systems it also shows the last init state. Pretty useful on remote systems, pretty useless on local ones :)

Get Cisco network information
This gives you lots of nifty Cisco network information like VLAN tag, port and switch information.

Converts uppercase chars in a string to lowercase

Remove everything except that file
it will remove everything except the file names matching you can use also use wildcards

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

list files recursively by size

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Execute a command at a given time

Adding a startup script to be run at bootup Ubuntu
This script will run each time you boot up.The script must be in /etc/init.d directory.


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