1) Find the number of hits towards your webserver . This one is very much help full to find whether you are facing any DDOS.
netstat -ntu | grep ':80' | awk '{print $5}' | sed 's/::ffff://' | cut -f1 -d ':' | sort | uniq -c | sort -nr | grep -v 127.0.0.1
2) Find and replace old files from backup .
Following command will find and remove all the directories which are older than 10 days and its name contains "2001"
find /backup/mysql_backup/ -mtime +10 -type d \( -iname "*-2001*" \) -exec rm -rf {} \;
3) Find and remove a file from a specified location
find . -name '*.class' | xargs /bin/rm -f
( dot “.” means the current working directory )
find /usr -name '*.class' | xargs /bin/rm -f
5) Archive a folder excluding unwanted directories
tar -zcvf /home/adminlogs.tar.gz --exclude='log' --exclude='tmp' /home/adminlogs
If you have more files/folders to exclude then you can create file and mention the exclude list on that
# vi exclude.txt
abc
abc2
abc3
# tar -zcvf /backup/adminlogs.tar.gz -X exclude.txt /home/adminlogs
6) Untar files to the specified location or directory
# tar -xzf /home/admin/adminlogs.tar.gz -C /tmp
Hope that this tips will be helpful for you
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