Commands tagged webcam (14)

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Use wget to download one page and all it's requisites for offline viewing

print indepth hardware info
wanna know something about your hardware? how about EVERYTHING?? then this should do ya well

sed /pat/!d without using sed (no RE; limited to shell patterns aka globbing)
POSIX requires this "string truncating" functionality. might as well use it, at least for very small tasks where invoking sed and using RE is overkill.

Mount important virtual system directories under chroot'ed directory
The command is useful when, e.g., booting an existing system with a rescue or installation CD where you need to chroot into the hard-disk and be able to do stuff which accesses kernel info (e.g. when installing Ubuntu desktop with LVM2 you need to mount and chroot the hard disk from a shell window in order to install packages and run initramfs inside chroot). The command assumes that /mnt/xxx is where the chroot'ed environment's root file system on the hard disk is mounted.

floating point operations in shell scripts
using bc is for sissies. dc is much better :-D Polish notation will rule the world...

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"

"What the hell is running on?!" Easily snoop your system's RAM consumption
Works on most unixes, on OpenBSD replace the "-g" parameter at the sort with a "-n".

add a gpg key to aptitute package manager in a ubuntu system
when we add a new package to a aptitude (the debian package manager) we need to add the gpg, otherwise it will show warning / error for missing key

Capitalize the first letter of every word

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"


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