One of the many ways to secure SQL Server is to review all passwords. You must also check for null passwords and if you locate any, change them. To list all users with null passwords, execute the following sql command: USE master GO SELECT name, password FROM syslogins WHERE password IS NULL;
Open windows command line Type netstat -bn -b Displays the executable involved in creating each connection or listening port. -n do not resolve hostnames Check for any suspicious connection.
Open your cmd and enter: hostname or tracert [ip_address] for ex. tracert 192.168.1.2
find / -name ‘myfile’ search from the root directory for the file named myfile find /home -iname ‘tes*’ search from the home directory for files that their name starts with tes find /home -name ‘*.bak’ -size -10000k search from the home directory for bak files that their size is less than 10MB [...]
To find biggest files in current directory: ls -lSrh To find biggest .bak files in current directory: ls -lSrh *.bak To find largest directories (this command takes a while – wait to finish): du -kx | egrep -v "\./.+/" | sort -n