Shell programming in ubuntu
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This document provides an overview of shell programming in Ubuntu. It defines what a shell is and explains that Bash is the default shell. It describes how to use the shell interactively in a terminal and by writing shell scripts. It then lists and describes common shell commands like pwd, cd, ls, less, cp, mv, rm, and mkdir. Finally, it explains how to write shell scripts, making the file executable and including the #!/bin/bash line to specify the Bash interpreter.
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2. Selecting the database to use with mysql_select_db().
3. Executing SQL queries to store/retrieve data with mysql_query().
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Microsoft holo lens
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- 2. Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
- 3. Shell Programming in Ubuntu ● Mohammed Jawad N V ● [email protected] ● www.facebook.com/username ● twitter.com/username ● in.linkedin.com/in/profilename ● 8590332199
- 4. SHELL PROGRAMMING IN UBUNTU ● Shell is a program that takes commands from the keyboard and gives them to the operating system to perform ● Bash (Bourne Again Shell) ● TERMINAL: Program that opens a window and lets you interact with the shell ● There are two primary ways to use the shell: interactivelyinteractively and by writing shell scripts. ● In the interactive mode, the user types a single command and the result is printed out
- 5. COMMANDS ● Pwd - (print working directory) ● cd - (change directory) ● ls - (list files and directories). ● less (view text files) ● cp - copy files and directories ● mv - move or rename files and directories ● rm - remove files and directories ● mkdir - create directories
- 6. ● type - Display information about command type ● help - Display reference page for shell builtin ● man - Display an on-line command reference ● chmod - modify file access rights ● su - temporarily become the superuser ● sudo - temporarily become the superuser ● Echo- command to display text or value of variable.
- 7. SHELL SCRIPTING ● a shell script is a file containing a series of commands. ● To be executable, a shell script file must meet some conditions: ● The file must have a special first line that names an appropriate command processor #!/bin/bash ● The file must be made executable by changing its permission bits. An example: $ chmod +x (shell script filename) ● In shell scripting, the user types anything from a few lines to an entire program into a text editor, then executes the resulting text file as a shell script.
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