Packer is a wrapper for Arch linux's package manager Pacman and Arch User Repository (AUR). Pacman can not install packages from AUR. This tool helps you do just that.

Install Requirements

:$ sudo pacman -S base-devel fakeroot jshon expac git

Get PKGBUILD

:$ wget https://aur.archlinux.org/cgit/aur.git/plain/PKGBUILD?h=packer

Rename the downloaded file.

:$ mv PKGBUILD\?h\=packer PKGBUILD

Run makepkg on the PKGBUILD

If you ever wanted to enable natural scrolling also called reverse scrolling on your linux desktop that doesn't have a touch pad, you will notice that mouse and touch pad settings does not have the option to enable natural scrolling like you would on a laptop.

To easily upgrade the nodejs, just run the following commands in your terminal.

:$ sudo npm cache clean -f
:$ sudo npm install -g n
:$ sudo n stable

To be able to see hidden partitions in Mac OS X using the Disk Utility, you have to enable the debug menu. Run the following command in your terminal to enable debug menu in Disk Utility.

defaults write com.apple.DiskUtility DUDebugMenuEnabled 1

Do this only if you know what you are doing!

Switch to Super User

:$ sudo su

To free pagecache

:# sync; echo 1 > /proc/sys/vm/drop_caches

To free dentries and inodes

:# sync; echo 2 > /proc/sys/vm/drop_caches

To free pagecache, dentries and inodes:

:# sync; echo 3 > /proc/sys/vm/drop_caches

If you going to play around with Bootloaders, it is wise to make a backup of your bootsector. Use the handy dd tool to make a backup.

dd if=/dev/hda of=bootsector.img bs=512 count=1

Make sure to change the drive device name hda to reflect whatever your system's is.

And to restore

dd if=bootsector.img of=/dev/hda 

rsync is an open source utility that provides fast incremental file transfer. rsync synchronizes directory stucture between two machines. To run rsync over SSH , provide the -e flag in the args.

rsync -ave ssh user@host.com:/home/user/mydropzone/ /home/user/mydropzone

By Default, rsync will not remove files/folders from the destination folder if they were removed on source since last rsync. To remove files/folders that are no longer present at remote, user --delete flag.