To generate a RSA key
openssl genrsa -out privkey.pem 2048
To generate a DSA key
openssl dsaparam -out dsaparam.pem 2048
Creating a certificate request
openssl req -new -key privkey.pem -out cert.csr
Creating a self-signed test certificate
openssl req -new -x509 -key privkey.pem -out cacert.pem -days 1095
commands to try
ps -aux , lsof, readelf,netstat
Look for recently modified files with find / -mtime -7 –print
Look for unusual SUID root files find / -uid 0 –perm -4000 –print
Look for files that do not belong to any existing user of the server with
find / -nouser -print
Tools to try
ebox,Tripwire,Nessus,Openvas,rkhunter,chkrootkit
nmap -s P subnet/netmask
ie
nmap -s P 192.168.X.X/XX