Methods of generating random data for mysql imports

UsersEmailGen3.sh

#!/bin/bash

echo "UserName,Email,FirstName,LastName,Password" > users.csv;
for i in $(seq 1 100);
do
	userid=$(uuidgen | sed 's/-//g');
	uniqueid=$(echo $userid | head -c 10);
	echo "$uniqueid,[email protected],FirstName,LastName,$( head -100 /dev/urandom | tr -dc a-zA-Z0-9 | fold -w ${1:-15} | head -1 )" >> users.csv
done

UsersGen1.sh

#!/bin/bash

echo "UserName,Email,FirstName,LastName,Password" > users.csv;
for i in $(seq 1 100);
do
	echo "$(uuidgen | sed 's/-//g'),$(uuidgen | sed 's/-//g')@temporary.net,FirstName,LastName,$( head -100 /dev/urandom | tr -dc a-zA-Z0-9 | fold -w ${1:-15} | head -1 )" >> users.csv
done

UsersGen2.sh

#!/bin/bash

echo "UserName,Email,FirstName,LastName,Password" > users2.csv;
for i in $(seq 1 100);
do
	echo "$(uuidgen | sed 's/-//g'),$(uuidgen | sed 's/-//g')@temporary.net,FirstName,LastName,$(head -c 10 /dev/random | base64 | head -c 10)" >> users2.csv
done