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Old 07-17-2013, 11:57 AM   #1
Registered: Nov 2011
Posts: 69

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Smile add user account to linux using a webpage

I have an bash script that I use to add a user account to the system but what I want is to add the user via webpage how do I do this?.

here is my code below from bash
STARTM=`date -u "+%s"`
# Script to add a user to this Linux system
if [ $(id -u) -eq 0 ]; then                                     # check if user is root
        read -p "Enter User Name : " username

        while [ -z $username ]|| egrep -w "^$username" /etc/passwd  1>/dev/null;
        echo -ne "Either user exists or you entered a blank, enter username again: ";read -e  username

        password=`</dev/urandom tr -dc A-Za-z0-9 | head -c8`

        echo -ne "\nPlease Enter your User ID Number: ";read -ern5 uid
        while [[ ! $uid =~ ^[0-9]+$ ]]||egrep $uid /etc/passwd >/dev/null; do
        echo -ne "Please re-enter your uid positive intergers only: ";read -ern5 uid

        read -p "Enter a Comment : " comment

        read -p "Enter Users Home Directory : " homedir
        while [ ! -d "$homedir" ];
        echo -ne "\n$homedir Directory Not Found! Please re-enter: "; read homedir

pass=$(perl -e 'print crypt($ARGV[0], "password")' $password) # passing the password entered
echo ""
                echo "Select the type of shell you will be using"
echo -e "1) Bash Shell - SFTP Secure\n"                         # Shell selection statement
echo -e "2) False Shell - FTP Unsecure\n"
echo -ne "Enter choice: ";read shell;
case $shell in
        shell=/bin/bash                                                 # case statment for shell selection.
        commentstatic="SFTP Account" 
        useradd -u $uid -p $pass -c "$comment $commentstatic" -d $homedir -s $shell $username
        echo -e "Copying System Files ...."
        cd /usr/local/T_Skel
        cp -Rp `ls` $homedir
        echo -e "Finished Copying System Files ..."
        tail -1 /etc/passwd > $homedir/etc/passwd
        echo "$username" >> /etc/ftpusers
        ssh -q root@ftp2 "echo -e '"$username"' >> /etc/ftpusers"
        commentstatic="FTP Account" 
        useradd -u $uid -p $pass -c "$comment $commentstatic" -d $homedir -s $shell $username
        echo "Setting security on users home directory"
        chown $username:ftp $homedir                                    # security settings for both shells
        chmod 775 $homedir
        echo -e "$username" '\t' "$homedir" >> /etc/security/chroot.conf

        echo "Sending information to FTP2"                              # sending information to failover server
        ssh -q root@ftp2 "useradd -u $uid -c '"$comment  $commentstatic"' -p $pass  -d $homedir -s $shell $username"
        ssh -q root@ftp2 "echo -e '"$username"' '\t' '"$homedir"' >> /etc/security/chroot.conf"
echo -e "\n\tThis users login details is as follows: \n"
echo -e "\n\tUsername is: $username \n"
echo -e "\tPassword is: $password \n"
echo -e "\tUser's ID Number is: $uid \n"
echo -e "\tComment is: $comment $commentstatic \n"
echo -e "\tUsers Home Directory is: $homedir \n"
echo -e "\tUsers Shell is: $shell \n"
STOPM=`date -u "+%s"`
if (($RUNTIMEM>59)); then
TTIMEM=`printf "%dm%ds\n" $((RUNTIMEM/60%60)) $((RUNTIMEM%60))`
TTIMEM=`printf "%ds\n" $((RUNTIMEM))`

echo -e "\tExecuting "script function" took: $TTIMEM\n"
Old 07-17-2013, 12:08 PM   #2
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Registered: Dec 2012
Location: Washington DC area
Distribution: Fedora, CentOS, Slackware
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The problem is security.

Anytime you use a web server to perform system functions (especially those that change configuration or add/change/remove users) you run the risk of giving your system away. Anything that can add a user, can also alter system files.

Then you have the issue of the system itself.

RH based systems rigorously isolate the web server from being able to perform such dangerous tasks.

for a base system, it is just a CGI using a suid program (danger) to apply the change... or an expect script with an embedded system password (way more danger) to run the current utilities to do so.

You would do better to use LDAP to put the login definitions elsewhere.


bash, linux, web, webpage

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