If you like using Control-R in bash to find previous commands here is a useful tip. You can add a comment to a command and then when you use Control-R searching by typing you can find it by your comment. Example I use apt update. Run command including your comment…
Test Tcp Open Port
If you don’t have telnet or nc installed and want to quickly test firewall traffic to a server and specific port you can try this. It needs a new enough bash but still pretty quick and handy. Good test port is open Port not open Good test port is open…
Bash Date Usage For Naming
I am recording some scripting I used to create backup classification/retention naming. It can be simplified into one function easily but I kept it like this so I can copy and paste easier which function I need. Script is pretty self explanatory but basically it takes today’s date and name…
Expect and bash
Quick example of spawning a problem that have a password prompt and can’t accept a documented parameter for a password. I used another bash script to simulate a password prompt but in my automation challenge it was an executable that prompted. Main script just to take a password for passing…
Powerline for your terminal on Ubuntu
I noticed on Fedora it is really easy to enable powerline in your terminal. This article explains it well: http://fedoramagazine.org/add-power-terminal-powerline/ On Ubuntu 15.04 it looks like powerline is pretty easy to enable although it did not appear like the tmux or vim powerline plugins are available from regular repos. Enable…
ZFSSA List Snapshots Script
Quick script to illustrate interacting with the ZFS Storage Appliance. In this example I am listing ZFSSA snapshots containing a search string. Note I edited this for the article without re-testing it still works.
Watch Process Id
Sometimes you want to keep tabs on a long running process and get notified by email when it is done. This is an example of just that.
Multi-Array in Bash
Well kind of… When you are used to working in Python or any real language then Bash arrays are pretty lame. But it can help in a few circumstances when you have to use Bash. And the result looks like this:
Bash And Exclusions in a List
Just a quick snippet on doing exclusions when you loop through a list. For some reason on Solaris sed had an issue with “\b” so I adjusted to sed “s/$EXCLUDE//g”. Shown as follow:
Disown and background a Unix process
Ever run a very large job and regretting not starting it in the excellent screen utility? If you don’t have something like reptyr or retty, you can do the following. Push the running job into the background using Control-Z and then background it. Then disown that job from the terminal.…