Check with the following things for analyzing server hacks in Linux server

Check with the following things for analyzing server hacks in Linux server
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1)Last command

2)Analyze the following logs
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apache error log
apache access log
var/log/messages
apache secure log

3) Verify all the ports

Analyze the following files
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/etc/userdomains
/etc/shadow
/etc/passwd
.bash history
/root/bash profile
lsattr