filelocations.txt

/etc/profile also pulls in configs from /etc/profile.d
/etc/profile.d to make changes to a shell environment
/etc/profile will then make the configs taken from /profile.d/ apart of itself

/etc/bashrc then pulls in global definitions that have been set up, server wide
/etc/skel

/etc/hosts
/etc/mytest 
/etc/X
/etc/inittab file
/etc/systemd/system/default.target
/etc/systemd/system/display-manager.service
/etc/passwd
/etc/shadow
/etc/group
/etc/default/useradd - location of the default settings for useradd
/etc/skel - location of the skeleton directory
/etc/login.defs - to view default configs for user creation with useradd

/etc/crontab
/etc/cron.hourly
/etc/cron.daily
/etc/cron.weekly
/etc/cron.monthly
/etc/cron.d is a crontab table file for system jobs
/etc/cron.deny will deny users listed in this file from using crontabs
/etc/cron.allow will allow users listed to create crontabs
/etc/at.allow
/etc/at.deny
/etc/cron.deny
/etc/cron.allow

/etc/localtime will hold this information
/etc/timezone 
/etc/ntp.conf
/etc/chrony.conf
/etc/chrony/chrony.conf

/etc/rsyslog.conf
/etc/rsyslog.d
/etc/rsyslog.conf you will want to comment out the proper rules
/etc/logrotate.conf this will trigger the logrotate daemon to run
/etc/logrotate.d
/etc/logrotate.conf  -f

/etc/systemd/journald.conf is the location of the journal config file
/etc/aliases is the file you will want to work with in order to get email forwarding to work
/etc/aliases.db is the file that the MTA uses for mail delivery

/etc/cups
/etc/hostname and runtime-wise /proc/sys/kernel/hostname
/etc/hostname will remain unchanged
/etc/hosts and it says, "You are here."
/etc/resolv.conf on it. 
/etc/nsswitch.conf which apparently empowers /etc/resolv.conf with more powers
/etc/nsswitch.conf

/etc/hosts
/etc/hostname
/etc/resolv.conf
/etc/nsswitch.conf
/etc/hosts and /etc/hostname
/etc/security/limits.conf file
/etc/sudoers
/etc/nologin file

/etc/passwd
/etc/shadow

/etc/xinetd.conf
/etc/xinetd.d is referenced and included into this config file at the very end of the file
/etc/xinetd.d/telnet
/etc/init.d/xinetd start
/etc/init.d/xinetd restart
/etc/hosts.allow file

/etc/ssh/sshd_config
/etc/ssh/ssh_host_rsa_key
/etc/ssh/ssh_host_dsa_key
/etc/ssh/ssh_host_ecdsa_key
/etc/ssh/ssh_host_ed
/etc/ssh/ folder we will see the key files that are used for encryption algorithims