Archive for the ‘Linux’ Category

Partitioning setup for Linux from Scratch in VirtualBox

I’ve finally taken the plunge and committed, to untarring and compiling, a bucket load of source code to complete Linux from Scratch. I’ll be documenting some of my setup here. I’m far from an expert, that’s why I’m doing this, but if you have any constructive criticism I’d be glad to hear it. I’m using […]

Highlight text using Grep without filtering text out

Here’s a neat little trick I learned today I thought was worth sharing. Sometimes I want to highlight text in a terminal screen using grep but without filtering other lines out. Here’s how you do it… ?View Code BASHmysqlbinlog mysql-bin.000473 | grep –color -E ‘^|not closed'; The important part is the regexp in grep. The […]

6 Useful Bash tips I wish I knew from day zero

Here’s a few bash commands tricks I wished I’d been shown when I first picked up the shell. Please share any additional favorites you have. Repeat the last command with sudo How often do you type… ?View Code BASHyum install long-list packages-devel Only to be told… You need to be root to perform this command. […]

Kibana splits on hostname

If you’re playing with Kibana and you notice any Pie charts splitting values incorrectly, i.e. on a hostname with hyphen characters, then here’s the fix you need to apply. It’s actually somethingĀ elasticsearch does… curl -XPUT http://localhost:9200/_template/syslog -d ‘ { “template”: “*syslog*”, “settings” : { “number_of_shards” : 1 }, “mappings” : { “file” : { “properties” […]

Bash script to execute a MariaDB query multiple times

This simple bash script will execute a query 100 times against a MySQL instance. It also uses the time command to report how long the entire process took. I use this for some very simple bench-marking. The query used here creates a temporary table and inserts 100K rows into it. You need the sequence engine […]