Shell Programming and Scripting

#!/bin/bash
function delete_user
{
set -x
i=0
for t in ${serverlist_array[@]}; do
SERVER=${serverlist_array[$i]}
# get the servers OS version and type
OSVER=`ssh $USER@$SERVER uname -r`
OSTYPE=`ssh $USER@$SERVER uname -s`
 
# get path to run root commands
if [ $OSVER = "5.10" ]; then
ADMINCMD=/usr/bin/pfexec
elif [ $OSTYPE = "Linux" ]; then
ADMINCMD=sudo
elif [ ! -z `ssh $USER@$SERVER ls /usr/local/bin/sudo` ]; then 
ADMINCMD=/usr/local/bin/sudo
elif [ ! -z `ssh $USER@$SERVER ls /opt/csw/bin/sudo` ]; then
ADMINCMD=/opt/csw/bin/sudo
fi
 
# determine if account is local or not
if ssh $USER@$SERVER grep -w "/export/home/$USERNAME" /etc/passwd
then
LOCALHOME="true"
else
LOCALHOME="false"
fi
 
 
# if the user account doesn't exists, write that out to log file
if [[ -z `ssh $USER@$SERVER cat /etc/passwd | grep -w $USERNAME` ]]; then 
echo "$SERVER Account_Doesnt_Exist" >> /tmp/passwdlist
fi
 
# While the user account exists on this server, create the account
while [[ -n `ssh $USER@$SERVER cat /etc/passwd | grep -w $USERNAME` ]]
do
# Determine is home directory lives local or on nas. Remove if local..
if [ $LOCALHOME = "true" ]; then
echo "Deleting user account AND local home directory on $SERVER" 
ssh -t $USER@$SERVER $ADMINCMD /usr/sbin/userdel -r $USERNAME
else 
echo "Deleting user account on $SERVER"
ssh -t $USER@$SERVER $ADMINCMD /usr/sbin/userdel $USERNAME
echo "PLEASE REMEMBER TO DELETE THE USERS HOME DIRECTORY ON THE HNAS!!"
fi
 
if [ -z `ssh $USER@$SERVER cat /etc/passwd | grep -w $USERNAME` ]; then
echo "$SERVER Account_Deleted" >> /tmp/passwdlist
else
echo "$SERVER Deletion_FAILED!!" >> /tmp/passwdlist
fi
 
done
i=$((i+1))
done
}

$ ssh username@host /bin/sh -s a b 3 <<"EOF"

        # Note that 'read' won't work as expected inside the <<"EOF" block
        # because stdin isn't the terminal, it's the script!

        echo
        echo "arg1 is $1"
        echo "arg2 is $2"
        echo "arg3 is $3"

        [ "$3" -gt 1 ] && echo "$3 > 1"

        exit 42
# This EOF must be at the beginning of the line
EOF
Password:

arg1 is a
arg2 is b
arg3 is 3
3 > 1
$ echo "ssh returned $?"
ssh returned 42
$

if [ -z `ssh $USER@$SERVER cat /etc/passwd | grep -w $USERNAME` ]

ssh username@host /bin/sh -s "$username" <<"EOF"
        if ! /usr/sbin/userdel "$1"
        then
                echo "Couldn't delete remote user"
                exit 1
        fi

        if grep -w "$1" /etc/passwd > /dev/null
        then
                echo "Deleting user failed"
                exit 1
        fi

        echo "Deleting user succeeded"
        exit 0
EOF

ssh username@host /bin/sh -s "$username" <<"EOF"
        if ! /usr/sbin/userdel "$1"
        then
                echo "Couldn't delete remote user" >> /tmp/passwdlist
                exit 1
        fi
 
        if grep -w "$1" /etc/passwd > /dev/null
        then
                echo "Deleting user failed" >> /tmp/passwdlist
                exit 1
        fi
 
        echo "Deleting user succeeded" >> /tmp/passwdlist
        exit 0
EOF

ssh username@host /bin/sh -s "$username" >> /tmp/passwdlist <<"EOF"
        if ! /usr/sbin/userdel "$1"
        then
                echo "Couldn't delete remote user"
                exit 1
        fi
 
        if grep -w "$1" /etc/passwd > /dev/null
        then
                echo "Deleting user failed"
                exit 1
        fi
 
        echo "Deleting user succeeded"
        exit 0
EOF

cat /tmp/passwdlist
sh-3.2$ > > > > sh-3.2$ sh3.2$ > > > > sh-3.2$ sh3.2$ Deleting user succeeded

ssh adminuser@host /bin/sh >> /tmp/passwdlist <<EOF
        if ! /usr/sbin/userdel "$deluser"
        then
                echo "Couldn't delete remote user"
                exit 1
        fi
 
        if grep -w "^$deluser" /etc/passwd > /dev/null
        then
                echo "Deleting user failed"
                exit 1
        fi
 
        echo "Deleting user succeeded"
        exit 0
EOF