Commands by prabhakaran9397 (2)

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

Get your external IP address if your machine has a DNS entry
Easy way to see your real external IP

From Vim, run current buffer in python

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

Find pages returning 404 errors in apache logs
Finds the top ten pages returning an http response code of 404 in an apache log.

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"

Check if *hardware* is 32bit or 64bit
This command tell you if your hardware is 32 or 64 bits even if you install a 32bits OS on a 64 bits hardware. If your distro don't support the -q switch, try doing : $ grep &>/dev/null '\' /proc/cpuinfo && echo 64 bits || echo 32 bits

Install pip with Proxy
Installs pip packages defining a proxy

umount all nfs mounts on machine

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" }


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