How to modify /etc/password file and compare the username to the username in a flat file if it finds it then replace the comments field in /etc/pasword and populated from a flat file with this string Ex. "C-137h 897 Abu Sassi (HP)".

Solution:

Here is the script:

# cat idmod
#!/usr/bin/ksh
PASSWD=/etc/passwd
MYFILE=/export/home/infile

while read LINE
do
USER=$(echo $LINE|awk '{FS=":";print $1}')
GECOS=$(echo $LINE|awk '{FS=":";print $2}')

printf "%-20s""Modifying $USER"
/usr/bin/grep -nli "^${USER}:" $PASSWD
if [ $? = 0 ]
then
usermod -c $GECOS $USER <<EOF> /dev/null 2>&1
none
none
none
$GECOS
EOF

echo "- Done\n"

else
echo "- Unable to Perform Your Request\n"
fi

done< $MYFILE
#

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