Some biographical details here.


Published:

Generate Random Data with Bash Script

I have been contributing to a project (node module) that required some load/use testing in the form of log files. I decided to write a quick bash script instead of testing the node module on an active server.

Basically, the script needed to generate random data in the form of multiple words followed by a large string and a path.

I posted the script as a Gist on Github here randomData.sh

#!/bin/bash
################################################################################
#
# randonData.sh
# Used to generate random strings to test nGrok node module.
#
################################################################################
#
# The MIT License (MIT)
# 
# Copyright (c) 2014 Justin Shattuck <[email protected]>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
################################################################################


randomString() {

index=0  
files=(/usr/local/*)  
str=""  
str1=""  
str2=""

for i in {a..z}; do arr[index]=$i; index=`expr ${index} + 1`; done  
for i in {A..Z}; do arr[index]=$i; index=`expr ${index} + 1`; done  
for i in {0..9}; do arr[index]=$i; index=`expr ${index} + 1`; done  
for i in {1..12}; do str="$str${arr[$RANDOM%$index]}"; done  
for i in {1..8}; do str1="$str1${arr[$RANDOM%$index]}"; done  
for i in {1..32}; do str2="$str2${arr[$RANDOM%$index]}"; done

printf "%s\n" "$str $str1 <$str2> (${files[RANDOM % ${#files[@]}]})"

}

# print for X seconds, passed with $1
#for t in $(seq ${start} $1 ${stop})

while :  
do  
    randomString
    sleep $1
done