UNIX for Dummies Questions & Answers

#!/usr/bin/sh

num_of_files=`ls /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | wc -l`

if [ $num_of_files -gt 3 ]
then
remove=`ls -lrt /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | head -1 | awk '{print $8}' | rm \`xargs\``
$remove
fi

rm: cannot remove `UMB00_UserActivity_20120103_094606.log': No such file or directory

 
#!/usr/bin/sh
num_of_files=`ls /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | wc -l`

if [ $num_of_files -gt 3 ]
then
remove=`ls -lrt /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | head -1 | awk '{print $8}'`
rm $remove
fi

$ ls -1tr /home/user/USER_LOGS/*UserActivity* | nawk '/UMB00/{if(NR==1){print "rm "$0}}' | sh

nssh# /home/nsadm/USER_LOGS/remover.sh
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory

#!/usr/bin/sh
num_of_files=`ls /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | wc -l`
while [ $num_of_files -gt 3 ]
do
    rm -rf `ls -lrt /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | head -1 | awk '{print $8}'`
    num_of_files=`ls /home/user/USER_LOGS/ | grep UserActivity | grep UMB00 | wc -l`
done

nssh# /home/user/remover.sh
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
rm: cannot remove `UMB00_UserActivity_20120103_094701.log': No such file or directory
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$ find /home/nsadm/USER_LOGS -name "UMB00_UserActivity*" -type f -mtime +3 -exec rm {} \;