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Answer : There is now a blog entry about Taking Screenshots in a Snap . It's built into Mac OS. ⌘ + ⇧ + 3 captures the whole screen ⌘ + ⇧ + 4 captures a custom rectangle (click and drag over the screen region you want to capture) ⌘ + ⇧ + 4 then space captures a specific window (move the mouse cursor over the desired window, then click) Press esc to cancel. Screenshots are saved onto your Desktop and timestamped. Holding control in addition to any of the sequences above causes the image to be copied instead of saved to the desktop. By default the image format is png . However, you can change the format by typing in the Terminal : defaults write com.apple.screencapture type image_format killall SystemUIServer Where image_format is one of jpg , tiff , pdf , png , bmp or pict (among others). If you omit the second line, you will need to log out and in again for the change to take effect. The settings for the shortcuts in the system preferences are ...

Answer : If you're willing to disable System Integrity Protection to continue using TotalTerminal, you can do that. If not, the developer of TotalTerminal says the reason he stopped working on it is that he switched to iTerm 2, which he says "offers similar functionality to Visor and comparable features to build-in [sic] Terminal.app." I've never used either, but another question on this site explains how to set up iTerm to work in a similar manner.

Answer : htop it is a terminal app: sudo apt-get install htop htop htop with graph mode ProcMeter3 Look for this system monitor (GUI works with GTK1,2,3): ProcMeter3 An utility which works with LCD devices even. ProcMeter3 GUI on GTK3 Psymon Also once I tried a Psymon . This is not extremely lightweight software and written on Qt (not GTK , and therefore should work better with KDE) though despite to this fact it works well not only with Unity and Gnome, but also in other OS, like FreeBSD, MacOS, Windows etc., because it use great python-psutil Debian package. So look it closer: Nice post about Psymon Psymon project site Psymon You can try xfce4-taskmanager from Xfce or lxtask from LXDE. Neither of them pull any specific dependencies. ndicator-SysMonitor Indicator-SysMonitor does a little, but does it well. Once installed and run, it displays CPU and RAM usage on your top panel. Simple. Download from here Conky One of my personal favourites ...

Answer : You definitely want Calibre. You can use it to convert virtually any file type to any other file type, as long as the source file doesn't have DRM (like Amazon, Adobe, etc.). If it does have DRM, check out Apprentice Alf's blog for help stripping it out with Calibre plugins. Don't use the DRM stripper to pirate books or otherwise violate your agreement with the vendor. Use it so you can enjoy your books on any device in any format. Calibre is also an awesome e-book management program that can do virtually everything. It can manage Kindles, Android phones/tablets, etc. It can even email your books with one click to your Kindle's email address if you want. You won't be disappointed :-) From a terminal: sudo apt-get install calibre Or search for it in Ubuntu Software Center To actually convert the EPUB file you can use the following command: ebook-convert file.epub file.pdf (For details, check this other answer) Or you can check the details for the...