![8vl3onvznkopxa6ny9995yrc4gw[1]](https://i0.wp.com/www.krazyworks.com/wp-content/uploads/2021/10/8vl3onvznkopxa6ny9995yrc4gw1-175x150.jpg "Awk & sed Snippets for SysAdmins")
Books have been written on the subject of awk and sed. Here’s a small sample of commands I put together over the years that are useful for everyday system administration tasks. Most of these tasks …
Read the full story »Resetting Admin Passwords on Windows
Resetting Local Administrator/User Passwords on Windows NT/2000/XP/2003
The following document explains how to change an unknown password for any local account (including Administrator) on a Windows NT/2000/XP/2003 system. Use this only for disaster recovery purposes.
Requirements:
1.Physical access …
Unix Commands Summary
awk/nawk [options] file scan for patterns in a file and process the results
cat [options] file concatenate (list) a file
cd [directory] change directory
chgrp [options] group file change the group of the file
chmod [options] file change file …
Moving filesystems with ufsdump
to move /opt on new partition (disk or file system)
1) from system prompt: format –> partition –> label
2) newfs -v /dev/dsk/c0t1d0s1 (target location)
3) mkdir /new_dir
4) mount /dev/dsk/c0t1d0s1 /new_dir
5) cd /new_dir
6) ufsdump 0f – /opt | …
Copying directories using tar and rsync
In this example we use the tar command to copy the contents of the /export/home directory to /temphome. This particular syntax forgoes the creation of an actual tarball file. This can be useful if you …
Increase swap space
Instructions for adding swap space on the fly for a Solaris system. Adding swap space via a swap file degrades system perfomance. However, this is a useful method for quickly adding swap space without interrupting …
Count users with “last”
Here is a quick example showing how to count users logged in on a particular date using the “last” command on Linux.
To display file’s modification, last access, etc
Display a file’s modification, last access and other attributes on Solaris.
Using NetBackup to restore boot disk
enable “Rename hard links”
disable “Rename soft links”
if root of destination drive is mounted as /destination/ then select “Restore to alternate path: from / to /destination/ , Restore search path
This is the alternate path for everything: …
Create tarball
The Unix tar command creates an archive of files and directories while preserving directory structure, file permissions and ownership information. This command is ideally suited for creating backups of most types of data. Many open-source …
Move USER to new primary group
A sample process for moving a user to a new primary home group on Solaris.
Check if Solaris supports 64-bit applications
How to determine if your installation of Solaris supports 64-bit applications.
Unix Files Transferred To CD
In our example we were requested to archive a 741 mb directory to CD. The source data resided on a Unix data server.
Copy directory structure and files with cpio
A basic command to copy directory structure and contents using cpio.
Using FTP with pipes
All The Reasons Pot Is Good For You
AP/Damian Dovarganes
Colorado and Washington both passed legislation that legalizes the recreational use of marijuana on Tuesday.
While recreational marijuana is controversial, many people believe that the drug should be legal, especially …
Create TAR and pipe through gzip
A simple example of creating a gzip-compressed tar archive of the current directory.
Fsck operations
The following is a collection of examples using fsck command. It is important to unmount VXFS before running fsck on Veritas filesystem.
RSync remote copy
The following is an example of using rsync to perform a irectory copy between two hosts over the network.
Oracle reinstallation
Before beginning Oracle REinstall, make sure to remove the /var/opt/oracle/oraInst.loc file created by /tmp/orainstRoot.sh script during prior installation.
Was this article helpful for you? Do you have any feedback? click this to get in contact with …
Commands & Shells »
Plundering Facebook Photo Albums
![wyryr1sn52gntzn65v4fpz5lc6v[1]](https://i2.wp.com/www.krazyworks.com/wp-content/uploads/2021/08/wyryr1sn52gntzn65v4fpz5lc6v1-80x80.jpg "Plundering Facebook Photo Albums")
Let’s imagine you need to download all the photos in a Facebook photo album. It can be a public album, a friend’s, or even your own. Sure, you can do this manually, but you probably …
Scraping a Web Page in Bash
![clfud46mxf2t5zph2l04zlpgl1d[1]](https://i2.wp.com/www.krazyworks.com/wp-content/uploads/2021/08/clfud46mxf2t5zph2l04zlpgl1d1-80x80.jpg "Scraping a Web Page in Bash")
Just a scripting exercise because I need to do something important, but I am procrastinating. The idea is simple: grab some URL with text containing somewhat structured data and convert it into a spreadsheet. I …
Applications »
Processing Videos with ffmpeg and Lightroom
![DSCF5361[1]](https://i1.wp.com/www.krazyworks.com/wp-content/uploads/2020/10/DSCF53611-80x80.jpg "Processing Videos with ffmpeg and Lightroom")
On occasion I wondered how to apply advanced photo filters to my lackluster GoPro and drone videos. You know, not the basic exposure/contrast/saturation or the cheesy special effects you find in video editors, but something …
Searching Twitter
![Cat-Devouring-A-Bird-Pablo-Picasso[1]](https://i0.wp.com/www.krazyworks.com/wp-content/uploads/2020/10/Cat-Devouring-A-Bird-Pablo-Picasso1-80x80.jpg "Searching Twitter")
Here are just a few hopefully useful tips for searching Twitter to get more relevant results and buy cheap twitter followers.
Data »
Scraping a Web Page in Bash
Just a scripting exercise because I need to do something important, but I am procrastinating. The idea is simple: grab some URL with text containing somewhat structured data and convert it into a spreadsheet. I …
Generating Random Text Files for Testing
![91ebozy1e3b138waujy28agrngy[1]](https://i2.wp.com/www.krazyworks.com/wp-content/uploads/2021/08/91ebozy1e3b138waujy28agrngy1-80x80.jpg "Generating Random Text Files for Testing")
Sometimes you need dummy folder structures populated with random data for testing your various scripts and processes – backups, file transfers, encryption, compression, etc. Every time I need something like this, I end up writing …
Monitoring »
Finding Cron Jobs
![iwoau71okwxqh4jv3k4ook32qps[1]](https://i2.wp.com/www.krazyworks.com/wp-content/uploads/2021/08/iwoau71okwxqh4jv3k4ook32qps1-80x80.jpg "Finding Cron Jobs")
Cron is an indispensable tool for system administration. The difficulties in working with cron in a large environment stem from its decentralized nature. Cron jobs multiply like rabbits, and keeping track of them is not …
Understanding Memory Utilization in Linux
![5gtysva4wkc8mzc1k3e66vaycxx[1]](https://i1.wp.com/www.krazyworks.com/wp-content/uploads/2021/08/5gtysva4wkc8mzc1k3e66vaycxx1-80x80.jpg "Understanding Memory Utilization in Linux")
This is a depressing – and all-too-common – scenario: a user runs the free command and opens a support case because he sees zero “free” memory on the server.
Networking »
Validating HTTPS Cache Peers for Squid
![sy2zeb1vp2h8itlxfbbylw0jrm0[1]](https://i0.wp.com/www.krazyworks.com/wp-content/uploads/2019/12/sy2zeb1vp2h8itlxfbbylw0jrm01-80x80.jpg "Validating HTTPS Cache Peers for Squid")
I have a squid proxy server that uses a long list of authenticated cache peers in a round-robin configuration. The process looks something like this:
Verifying SNMP Connectivity on Multiple Hosts
![Photo-2019-10-07-14-39-03_0266[1]](https://i1.wp.com/www.krazyworks.com/wp-content/uploads/2019/11/Photo-2019-10-07-14-39-03_02661-80x80.jpg "Verifying SNMP Connectivity on Multiple Hosts")
I needed to check if SNMP was accessible on whatever live servers that existed in a particular subnet. Here’s a quick script to do this.
Editor
Igor
Sr. Unix SysAdmin with twenty years experience supporting Solaris, HP-UX, AIX, IRIX, and Linux servers in a large distributed environment.
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