Technical notes, and other ideas.
Refer: https://tecadmin.net/tutorial/bash-scripting/bash-debugging/
Example – Enable Debug in Script
You can enable debug mode by adding set -xv option inside a shell script. This is useful to enable debugging for some part of the script.
#!/bin/bash
set -xv # this line will enable debug
cd /var/log/
for i in "*.log"; do
du -sh $i
doneRefer: https://www.crmarsh.com/aws/
To have your account use bash, you need to update your account:
$ sudo vi /etc/passwd
You will need at the end - ::/home/mruckman:/bin/bash
This is both your home directory and also the :/bin/bash says to use bash
#!/bin/bash
rm -rf /mnt/xampp/*
cd /home/mruckman/Documents/bookingflow
grunt
cd /home/mruckman/Documents/bookingflow/build
cp -r . /mnt/xampp
Simple script to rename log files with their last modified date.
Sample: rename_log.sh
Refer: https://www.cyberciti.biz/faq/bash-for-loop/
for i in `find . -name '*.xml'`
do
echo $i
doneThis type of for loop is characterized by counting. The range is specified by a beginning (#1) and ending number (#5). The for loop executes a sequence of commands for each member in a list of items. A representative example in BASH is as follows to display welcome message 5 times with for loop:
#!/bin/bash
for i in 1 2 3 4 5
do
echo "Welcome $i times"
doneSometimes you may need to set a step value (allowing one to count by two’s or to count backwards for instance). Latest bash version 3.0+ has inbuilt support for setting up ranges:
#!/bin/bash
for i in {1..5}
do
echo "Welcome $i times"
doneBash v4.0+ has inbuilt support for setting up a step value using {START..END..INCREMENT} syntax:
#!/bin/bash
echo "Bash version ${BASH_VERSION}..."
for i in {0..10..2}
do
echo "Welcome $i times"
doneThe following lists running commands
ps -ef
In UNIX/Linux, you can use grep and wc to count occurrences
cat mystuff.txt | grep -i "search" | wc -l
Use the diff command with the -q switch for simple output, such as:
diff -q folder1 folder2 | sort > compare.txt
At the time of this writing the package to install was the following:
sudo apt-get install libsdl-sound1.2
The command in the bash script to use is as follows:
playsound ding.wav
In your home folder
gedit .bashrc
Add the following lines at the bottom of the file:
# CHANGE DEFAULT LOCATION OF STARTUP
cd ~/Desktop