Ubuntu Linux, ubuntu desktop, Linux operating system, ubuntu guide

Linux, Unix, MAC

Fedora,CentOS, Redhat

Type the following command to get list of all installed software

# rpm -qa | less 

# yum list installed


Debian,Ubuntu

# dpkg --get-selections

Gentoo Linux

# qlist -I

SUSE Linux

# zypper -l

FreeBSD,OpenBSD, Solaris

# pkg_info | less

AIX

# lspp

MAC

# pkgutil --pkgs

You can use you android device as a document scanner, with the help of an app called CamScanner. It is free Android app that converts your smartphone into a scanner and digitizes  paper document using your samrtphone camera. The app also has features like cropping, image enhancement and the ability to create a PDF from your scanned files.

Camscanner also allows the user to upload documents to the cloud and manage them by tagging or searching. With this app, Android phone users can manage their written notes, business cards, memos and magazines at one place, and carry them anywhere.

With this app, user can can also backup their files to an SD card, so that they can be restored at any time. The app can reduce file size of PDFs and other files.