Download Linux Command Line and Shell Scripting Bible by Richard Blum PDF

By Richard Blum

There's much to be acknowledged for going again to fundamentals. not just does this Bible offer you a short refresher at the constitution of open-source Linux software program, it additionally exhibits you the way to circumvent the hefty graphical person interface on Linux structures and begin interacting the short and effective way?with command traces and automatic scripts. You'll find out how to deal with records at the filesystem, begin and forestall courses, use databases, even do net programming?without a GUI?with this one-stop source.

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Obviously, this process takes time, and can slow down a running process. The process of swapping out memory pages for running applications continues for as long as the Linux system is running. You can see the current status of the virtual memory on your Linux system by viewing the special /proc/meminfo file. tex V2 - 04/03/2008 2:57pm Starting with Linux Shells HugePages Free: HugePages Rsvd: Hugepagesize: 0 0 4096 kB # The Mem: line shows that this Linux server has 256 MB of physical memory. It also shows that about 4 MB is not currently being used (free).

The scroll region is the amount of memory the terminal has that enables it to ‘‘remember’’ data as it scrolls off of the screen. A standard DEC VT102 terminal contained a viewing area for 25 lines of characters. As the terminal displays a new line of characters, the previous line is scrolled upward. When the terminal reaches the bottom line of the display, the next line causes the top line to scroll off the display. The internal memory in the VT102 terminal allowed it to save the last 64 lines that had scrolled off of the display.

The bar at the bottom of the desktop is called the Panel. The Panel consists of four parts: ■ The K menu: Similarly to the Windows Start menu, the K menu contains links to start installed applications. ■ Program shortcuts: These are quick links to start applications directly from the Panel. ■ The taskbar: The taskbar shows icons for applications currently running on the desktop. ■ Applets: These are small applications that have an icon in the Panel that often can change depending on information from the application.

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