Script to add multiple user account in Linux

Here is my shell script to add multiple user account (batch mode) in my linux box. I hope you like it, and if you have any suggestions please let me know.

#!-bin-sh

## SCRIPT TO ADD MULTIPLE USERS TO A LINUX SYSTEM ## ## The script will add users, generate secure pbuttword and mail ## info to the users. Also a log file is made! ## ## You need to make it work: ## ## mailx - traditional command-line-mode mail user agent ## pwgen - pbuttword generator ## ## userlist format: USERNAME NAMES LASTNAME CLbutt EMAIL ## ## (c) 2005 Manuel de la Torre ##

# Modify this variables if you need

MINDAYS=0 # Change pbuttword at anytime MAXDAYS=45 # Max days pbuttword is valid WARNDAYS=10 # Warning message before expire pbuttwd EXPDAYS=180 # Days to expire account from now INACTIVE=45 # Days to lock after pbuttwd expires

# Calculte days from Epoch YEARSFROMEPOCH="$((($(date +%G) - 1970 ) * 365 ))" DAYSTHISYEAR="$((($(date +%j))))" DAYSFROMEPOCH=$(( $YEARSFROMEPOCH + $DAYSTHISYEAR + 8 ))

# Define some colors first: red='-e0;31m' RED='-e1;31m' blue='-e0;34m' BLUE='-e1;34m' cyan='-e0;36m' CYAN='-e1;36m' NC='-e0m' # No Color

# Ensure that root is running the script WHOAMI=`-usr-bin-whoami` if $WHOAMI != "root" ; then echo "Sorry. You must be root to add new users" exit 1 fi

# Ensure proper format of the command

thiscmd=`basename $0`

if "$#" -ne 1 ; then echo "USAGE: $thiscmd userfile" && exit 1 fi

USRFILE=$1

# Remove blank lines from input file # Used this solution because of problems # with the IFS in a if -n statement #

# Check if buffer file exist, then remove

if -atmp-buffer then rmtmp-buffer

fi

# Read input file, and delete blank lines

cat $USRFILE while read TEMP

do if -n "$TEMP" ; then fi done

# Copy temporal file to input file

cptmp-buffer $USRFILE rmtmp-buffer

# # Save the current value of the IFS ifs="$IFS"

# Define the separator (TAB) between fields # if your input has tabs between fields #IFS=`echo t tr t '-t'`

# Define the separator (COMMA) between fields # if your input has spaces between fields IFS=","

# buttumning the file has one line per user, in a layout like: # # USERNAME NAMES LASTNAME CLbutt EMAIL #

# Configure the useradd program globaly: # useradd -D -b $DEFHOME -e $EXPIRE -g $GROUP

cat $USRFILE while read USERNAME NAMES LASTNAME CLbutt EMAIL

do

USERNAME=`echo $USERNAME tr A-Z a-z` #lower case FULLNAME="$NAMES $LASTNAME" COMMENT="$FULLNAME,$CLbutt"

# Check if users exists in system

NOEXISTE=`cut -d: -f1etc-pbuttwd grep -i $USERNAME`

if -n "$NOEXISTE" ; then echo -e "Creating user $USERNAME:t ${RED}FAILED${NC}" else # Some output to keep you happy echo -e "Creating user $USERNAME:t ${CYAN}SUCCESS${NC}"

# Add the user

useradd $USERNAME -c "$COMMENT" -m

# Set the initial pbuttword

PbuttWORD=`pwgen -s` echo $USERNAME:$PbuttWORD chpbuttwd

# Change expitation of pbuttwords

chage -m $MINDAYS -M $MAXDAYS -E $(( $EXPDAYS + $DAYSFROMEPOCH )) -I $INACTIVE -d 0 $USERNAME

# Mail pbuttword

echo -e "login: $USERNAMEnpbuttw: $PbuttWORD" mail -s "Account Info"

# Log the results userscreatedlog

fi done