Commands tagged ntp (1)

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Better recursive grep with pretty colors... requires ruby and gems (run: "gem install rak")

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

finding more large files

Adjust display hardware brightness [dbus way]

Copy ssh keys to user@host to enable password-less ssh logins.
To generate the keys use the command ssh-keygen

List hostnames of all IPs

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"

Getting ESP and EIP addresses from running processes
'ps' let you specify the format that you want to see on the output.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Get a list of all your VirtualBox virtual machines by name and UUID from the shell
A similar command that lists only the currently running VMs is thus: $ VBoxManage list runningvms ...the above showing a list of VMs by name and UUID in the same format as the "$ VBoxManage list vms" command

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