1 / 17

System Administration HW3 Shell Script

This project involves creating a one-line command for displaying per-user socket statistics, managing ZFS snapshots, and developing a simple RSS feed reader using cdialog. The socket statistics must be output in descending order based on socket count, while ZFS snapshot management requires clear logging and handling of snapshots via specified commands. The RSS feed reader must support functionalities like reading, adding, deleting, and updating subscriptions, with proper handling of files and a user-friendly GUI.

riley-dunlap
Download Presentation

System Administration HW3 Shell Script

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. System Administration HW3Shell Script changlp

  2. Requirements • User socket statistic (20%) • Use one-line command to show per-user socket statistic • ZFS snapshot management script (20%) • Script for ZFS snapshot management/rolling • RSS feed reader (60%) • A simple RSS feed reader using cdialog(1)

  3. User Socket Statistic – Requirements (1/2) • Use one-line command to show user socket statistic • $ sockstat • The output should be sorted by socket count in descending order • Socket count threshold • Use environment variable ‘THRESHOLD’ • Treat as 0 if ‘THRESHOLD’ is not set • Output format • User: count ( processes… )

  4. User Socket Statistic – Requirements (2/2) • Only pipes (cmd | cmd) and backquotes (`cmd`) are allowed • No temporary files and variables (e.g. environment vars except THRESHOLD) • No “&&” “||” “>” “>>” “<“

  5. User Socket Statistic - Example

  6. ZFS Snapshot Management Script – Requirements (1/2) • Write a script to do ZFS snapshot and snapshot rolling • cron(8) • Syntax • zfsSnap.sh -f <fs> -n <name> <-c <count> | -d> • -f • Target ZFS dataset • -n • Name of ZFS snapshot • -c • Number of ZFS snapshot copy to preserve • -d • Delete snapshots in <fs> with <name> • Note that –c and –d are exclusive options

  7. ZFS Snapshot Management Script – Requirements (2/2) • Logging with syslog • logger(1) • Please log PID, script name into local7.notice • Your script should output log when • Old snapshots rotated • New snapshots taken • Snapshots deleted Oct 27 15:32:08 Archon zfsSnap[2699]: Old snapshot: zTmp@test.2 rotated Oct 27 15:32:10 Archon zfsSnap[2709]: New snapshot: zTmp@test.0 Oct 27 15:32:13 Archon zfsSnap[2727]: Deleted snapshots: zTmp@test.*

  8. ZFS Snapshot Management Script - Example • Create snapshot (-c count) • Delete snapshot (-d)

  9. RSS Feed Reader – Requirements (1/2) • Write a simple RSS reader with GUI • devel/cdialog • Support the following functions • Read (15%) • Read subscribed feed • Add (15%) • Add new subscription • Delete (15%) • Delete existing subscription • Update (15%) • Update subscription • Please store all files into ./feed/

  10. RSS Feed Reader – Requirements (2/2)

  11. RSS Feed Reader – Read back

  12. RSS Feed Reader – Add Use site title as default feed name

  13. RSS Feed Reader – Delete • You must remove related files / directories

  14. RSS Feed Reader – Update

  15. RSS Feed Reader – RSS Parser • For simplicity, TA would provide a simple RSS parser • https://raw.github.com/iamben/fetchFeeds/master/fetchFeeds.py • https://github.com/iamben/fetchFeeds • README • Write your own one • textproc/hs-feed • textproc/p5-XML-FeedPP • textproc/pear-XML_Feed_Parser • textproc/py-feedparser • textproc/ruby-rss

  16. Hand-in • Due • 2011/11/15 18:30 • Demo & How • TBA

  17. Help IRC channel #nctuNASA on freenode Newsgroup cs.course.sysadmin BBS bs2.to board CS-SysAdmin Email ta@nasa.cs.nctu.edu.tw Goto CSCC to ask professional 3F!

More Related