These early versions of Lubuntu, including 8. LXDE can also be retroactively installed in earlier Ubuntu versions.
September 07, As a system administrator, you run across numerous challenges and problems. Managing users, disk space, processes, devices, and backups can cause many system administrators to lose their hair, good humor, or sanity.
Shell scripts can help, but they often have frustrating limitations. This is where a full-featured scripting language, such as Python, can turn a tedious task into an easy and, dare I say it, fun one.
The examples in this article demonstrate different Python features that you can put to practical use. If you work through them, you'll be well on your way to understanding the power of Python.
About modules A module is an important Python concept. Basically, a module is a resource you import in order to use it. This process is comparable to taking a piece of paper out of a file cabinet and putting it on your desk, ready for use.
You import modules using the import command, which appears at the top of each of the example programs.
Modules are available for database connectivity, network programming, operating system services, and hundreds of other useful areas. Put Python to work Python has many features to recommend it: It's free, being open source. It's easy to learn. Many users find its syntax much more English-like than other scripting languages.
Python has been around a long time, which means its code is stable, lots of modules add functionality, and robust documentation is available on the Web.
Python is a full-featured, robust programming language and, as such, it has tons of features. Learning it could be a task of epic proportions. However, remember that many Python features, such as the GUI toolkits, are of limited value to system administrators.
That's why this article uses specific examples: They demonstrate the skills you need to effectively write Python scripts to manage systems.
Notes on the examples Each example includes a try: This is an implementation of rudimentary error handling. Python has extensive support for handling all types of exceptions but, for the purposes of these example programs, I've kept it simple. These examples were run on Python 2.
You'll undoubtedly think of ways these scripts can be improved. The nature of Python scripts is that they can be easily modified and customized without needing to recompile code.
Search for files and show permissions in a friendly format The first example program see Listing 1 searches for files that match a pattern based on user input and displays the results to the screen, along with the permissions assigned to the particular files.
At first, you might think this program doesn't do much more than execute a find command; however, it displays results in a customized way, and your options for displaying this enhanced find are limitless.
The example shows you how to take a system command and make it better or at least more customized. The script basically performs three tasks: Get the search pattern from the user. Present the results to the user. In writing the script, constantly ask yourself this question, "Which task is this code supporting?
Search for files and list results with file permissions import stat, sys, os, string, commands Getting search pattern from user and assigning it to a list try: Ask the user for a search pattern lines Print a listing of files found lines Using the stat module, get permissions for each file found and display them to the screen lines When the program is run, the output looks like that shown in Listing 2.
Perform operations on a tar archive that is based on menu selection The previous example prompted the user for a search pattern to use.The design of all built-in operating system dependent modules of Python is such that as long as the same functionality is available, srmvision.com (fd, str) ¶ Write the srmvision.com (increment) ¶ Add increment to the process’s “niceness”.
Return the new niceness. This module provides a portable way of using operating system dependent functionality. If you just want to read or write a file see open(), if you want to manipulate paths, see the srmvision.com module, and if you want to read all the lines in all the files on the command line see the fileinput module.
For creating temporary files and directories see the tempfile module, and for high-level file and. Python Program to Add Two Numbers.
In this program, you will learn to add two numbers and display it using print() function. To understand this example, (memory efficient), it is not quite readable.
Some people will have difficulty understanding it. It is better to write clear codes. So, there is always a compromise between clarity and. IBM i Adds functions and features to almost all components of the operating system and to many of the associated products from IBM Power Software and IBM Software.
Lubuntu (/ l ʊ ˈ b ʊ n t uː / luu-BUUN-too) is a lightweight Linux distribution based on Ubuntu, using the LXQt desktop environment in place of Ubuntu's GNOME desktop.
Lubuntu was originally touted as being "lighter, less resource hungry and more energy-efficient", but now aims to be "a functional yet modular distribution focused on getting out of the way and letting users use their computer".
It is, however, technically possible to create an operating system centered on Python, that is; have only the very low level stuff in written in C and assembly and have most of the rest of the operating system written in Python. This article discusses with more detail what languages are suitable for writing operating system kernels.