1 / 11

Significance of Scripting Languages for Operating System Administration

INFuture2007. Significance of Scripting Languages for Operating System Administration. Vladimir Mateljan Željka Požgaj Krunoslav Peter. Introduction. analysis of scripting programming languages

wyatt
Download Presentation

Significance of Scripting Languages for Operating System Administration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. INFuture2007 Significance of Scripting Languagesfor Operating System Administration Vladimir Mateljan Željka Požgaj Krunoslav Peter

  2. Introduction • analysis of scripting programming languages • why they are significant for operating system (OS) administration, especially for automating administration tasks

  3. OS Administration GUI Tool – pointing and clicking Command Line – writing and executing commands

  4. Automation of OS Administration • sequences of OS’s shell commands – simple programming solutions – scripts • scripting languages (SLs) can be used for development of program solutions used in the automation of OS administration with a minimum code usage

  5. Scripting Programming Languages • interpreted programming languages • building applications from reusable components • rapid application development • building minimalist but functional program solutions • examples: • bash – shell SL • awk – apattern scanning and text processing language

  6. The Shell Language - bash • simple and expressive syntax: • command: command [switch] [argument] • statement: command [; command] • piping (sending data from one to another command): command [| command] • redirection (sending data to file): command [> file] • script: statement [statement]

  7. ThePattern Scanning and Text Processing Language - awk • the syntax for invoking awk: • specifying a script on the command line: awk ‘script’ file [file] • invoking awk with a script file: awk -f script file [file] • the structure of the awk script: pattern { procedure } pattern { procedure } ... • example – counting rows in text file : $ awk '{ i++ } END { print i }' file.txt

  8. Statement, Alias, and Script • statement: $ ls | grep txt | wc -l • alias: $ alias lsx='ls | wc -l' • script: #!/bin/bash echo __Text Docs__ > doc.txt ls | grep doc >> doc.txt

  9. Pragmatics of SL • simple and expressive syntax • single data type – string • powerful operations – piping and redirection • example – stoping process that has string “sleep” in name: $ ps | awk '$4 ~ /sleep/ { cmd = "kill -9 " $1; print | cmd }'

  10. Significance of SLs for OS Administration • scripts – tools for automating common administration tasks • additional benefits: • documenting steps of administration tasks • history (execution log)

  11. Conclusion • SLs are appropriate for rapid development of program solutions used in the automation of OS administration with a minimum code usage • integration of reusable components from the framework that includes OS's shell commands

More Related