Ubuntu-cheat-sheet.png (PNG-bilde, 504x601 punkter) Learning the shell. Why do you need to learn the command line anyway?
Well, let me tell you a story. Not long ago we had a problem where I used to work. There was a shared drive on one of our file servers that kept getting full. I won't mention that this legacy operating system did not support user quotas; that's another story. But the server kept getting full and stopping people from working. Du -s * | sort -nr > $HOME/space_report.txt Graphical user interfaces (GUIs) are helpful for many tasks, but they are not good for all tasks.
I once heard an author remark that when you are a child you use a computer by looking at the pictures. Linux Directory Structure (File System Structure) Explained with Examples. By Ramesh Natarajan on September 8, 2010 Have you wondered why certain programs are located under /bin, or /sbin, or /usr/bin, or /usr/sbin?
For example, less command is located under /usr/bin directory. Why not /bin, or /sbin, or /usr/sbin? What is the different between all these directories? In this article, let us review the Linux filesystem structures and understand the meaning of individual high-level directories. 1. / – Root Every single file and directory starts from the root directory.Only root user has write privilege under this directory.Please note that /root is root user’s home directory, which is not same as /. 2. Contains binary executables.Common linux commands you need to use in single-user modes are located under this directory.Commands used by all the users of the system are located here.For example: ps, ls, ping, grep, cp. 3. 4. 5.
Contains device files.These include terminal devices, usb, or any device attached to the system.For example: /dev/tty1, /dev/usbmon0. Learn Linux, 101: The Linux command line. Overview This article gives you a brief introduction to some of the major features of the bash shell, and covers the following topics: Interacting with shells and commands using the command lineUsing valid commands and command sequencesDefining, modifying, referencing, and exporting environment variablesAccessing command history and editing facilitiesInvoking commands in the path and outside the pathUsing man (manual) pages to find out about commands This article helps you prepare for Objective 103.1 in Topic 103 of the Junior Level Administration (LPIC-1) exam 101.
The objective has a weight of 4. The material in this article corresponds to the April 2009 objectives for exam 101. Back to top The bash shell The bash shell is one of several shells available for Linux. Before we delve deeper into bash, recall that a shell is a program that accepts and executes commands. Shells have some builtin commands, such as cd, break, and exec. Shells also use three standard I/O streams: Listing 1. Echo. Bash commands - Linux MAN Pages. Commands marked • are bash built-ins Many commands particularly the Core Utils are also available under alternate shells (C shell, Korn shell etc).