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Audacity Copy

I was getting an error when launching Audacity.

The error was:

“The system has detected that another copy of Audacity is running.”

However, Audacity wasn’t running at all. Not one process. It turned out to be just a locked file located in /var/tmp/audacity-[your-username].

All you have to do is delete the entire directory and rerun Audacity.

rm -rf /var/tmp/audacity=[your-username]/

Once deleted, Audacity starts right up with no issues.

Bash Variables

Here’s how to read Bash variables from another file.

Contents of config.sh

#!/bin/bash
var1='thisisvariableone'
var2='thisisvariabletwo'

Call config.sh from another script.

#!/bin/bash
source config.sh
echo var1
echo var2

This is extremely helpful if you have multiple scripts using a common variable. You just to update one file instead of multiple files. All the other scripts will read and pick up the same variables from a config file. You can use this to setup your global variables.

Split A Large File

How to split a large file. 

split -b 500MB httpd.log
ll -lh
total 1.9G
-rw-r--r-- 1 root root 954M Mar 25 12:35 httpd.log
-rw-r--r-- 1 root root 477M Mar 25 12:38 xaa
-rw-r--r-- 1 root root 477M Mar 25 12:38 xab

Split with an output file.

split -b 200M httpd.log split.log
ll -lh
total 1.9G
-rw-r--r-- 1 root root 954M Mar 25 12:35 httpd.log
-rw-r--r-- 1 root root 200M Mar 25 12:52 split.logaa
-rw-r--r-- 1 root root 200M Mar 25 12:52 split.logab
-rw-r--r-- 1 root root 200M Mar 25 12:52 split.logac
-rw-r--r-- 1 root root 200M Mar 25 12:52 split.logad
-rw-r--r-- 1 root root 154M Mar 25 12:52 split.logae