Here you have a list of Linux Interesting files. They can be used to extract sensitive information leading to further exploitation.
It is always important to read the Administrator Guide of any application and appli the best security practices to configiguration file.
Any misconfiguration is a potential vector of attack.
• /etc/passwd
• /etc/shadow
• /etc/aliases
• /etc/anacrontab
• /etc/apache2/apache2.conf
• /etc/apache2/httpd.conf
• /etc/at.allow
• /etc/at.deny
• /etc/bashrc
• /etc/bootptab
• /etc/chrootUsers
• /etc/chttp.conf
• /etc/cron.allow
• /etc/cron.deny
• /etc/crontab
• /etc/cups/cupsd.conf
• /etc/exports
• /etc/fstab
• /etc/ftpaccess
• /etc/ftpchroot
• /etc/ftphosts
• /etc/groups
• /etc/grub.conf
• /etc/hosts
• /etc/hosts.allow
• /etc/hosts.deny
• /etc/httpd/access.conf
• /etc/httpd/conf/httpd.conf
• /etc/httpd/httpd.conf
• /etc/httpd/logs/access_log
• /etc/httpd/logs/access.log
• /etc/httpd/logs/error_log
• /etc/httpd/logs/error.log
• /etc/httpd/php.ini
• /etc/httpd/srm.conf
• /etc/inetd.conf
• /etc/inittab
• /etc/issue
• /etc/lighttpd.conf
• /etc/lilo.conf
• /etc/logrotate.d/ftp
• /etc/logrotate.d/proftpd
• /etc/logrotate.d/vsftpd.log
• /etc/lsb-release
• /etc/motd
• /etc/modules.conf
• /etc/motd
• /etc/mtab
• /etc/my.cnf
• /etc/my.conf
• /etc/mysql/my.cnf
• /etc/network/interfaces
• /etc/networks
• /etc/npasswd
• /etc/passwd
• /etc/php4.4/fcgi/php.ini
• /etc/php4/apache2/php.ini
• /etc/php4/apache/php.ini
• /etc/php4/cgi/php.ini
• /etc/php4/apache2/php.ini
• /etc/php5/apache2/php.ini
• /etc/php5/apache/php.ini
• /etc/php/apache2/php.ini
• /etc/php/apache/php.ini
• /etc/php/cgi/php.ini
• /etc/php.ini
• /etc/php/php4/php.ini
• /etc/php/php.ini
• /etc/printcap
• /etc/profile
• /etc/proftp.conf
• /etc/proftpd/proftpd.conf
• /etc/pure-ftpd.conf
• /etc/pureftpd.passwd
• /etc/pureftpd.pdb
• /etc/pure-ftpd/pure-ftpd.conf
• /etc/pure-ftpd/pure-ftpd.pdb
• /etc/pure-ftpd/putreftpd.pdb
• /etc/redhat-release
• /etc/resolv.conf
• /etc/samba/smb.conf
• /etc/snmpd.conf
• /etc/ssh/ssh_config
• /etc/ssh/sshd_config
• /etc/ssh/ssh_host_dsa_key
• /etc/ssh/ssh_host_dsa_key.pub
• /etc/ssh/ssh_host_key
• /etc/ssh/ssh_host_key.pub
• /etc/sysconfig/network
• /etc/syslog.conf
• /etc/termcap
• /etc/vhcs2/proftpd/proftpd.conf
• /etc/vsftpd.chroot_list
• /etc/vsftpd.conf
• /etc/vsftpd/vsftpd.conf
• /etc/wu-ftpd/ftpaccess
• /etc/wu-ftpd/ftphosts
• /etc/wu-ftpd/ftpusers
• /logs/pure-ftpd.log
• /logs/security_debug_log
• /logs/security_log
• /opt/lampp/etc/httpd.conf
• /opt/xampp/etc/php.ini
• /proc/cpuinfo
• /proc/filesystems
• /proc/interrupts
• /proc/ioports
• /proc/meminfo
• /proc/modules
• /proc/mounts
• /proc/stat
• /proc/swaps
• /proc/version
• /proc/self/net/arp
• /root/anaconda-ks.cfg
• /usr/etc/pure-ftpd.conf
• /usr/lib/php.ini
• /usr/lib/php/php.ini
• /usr/local/apache/conf/modsec.conf
• /usr/local/apache/conf/php.ini
• /usr/local/apache/log
• /usr/local/apache/logs
• /usr/local/apache/logs/access_log
• /usr/local/apache/logs/access.log
• /usr/local/apache/audit_log
• /usr/local/apache/error_log
• /usr/local/apache/error.log
• /usr/local/cpanel/logs
• /usr/local/cpanel/logs/access_log
• /usr/local/cpanel/logs/error_log
• /usr/local/cpanel/logs/license_log
• /usr/local/cpanel/logs/login_log
• /usr/local/cpanel/logs/stats_log
• /usr/local/etc/httpd/logs/access_log
• /usr/local/etc/httpd/logs/error_log
• /usr/local/etc/php.ini
• /usr/local/etc/pure-ftpd.conf
• /usr/local/etc/pureftpd.pdb
• /usr/local/lib/php.ini
• /usr/local/php4/httpd.conf
• /usr/local/php4/httpd.conf.php
• /usr/local/php4/lib/php.ini
• /usr/local/php5/httpd.conf
• /usr/local/php5/httpd.conf.php
• /usr/local/php5/lib/php.ini
• /usr/local/php/httpd.conf
• /usr/local/php/httpd.conf.ini
• /usr/local/php/lib/php.ini
• /usr/local/pureftpd/etc/pure-ftpd.conf
• /usr/local/pureftpd/etc/pureftpd.pdn
• /usr/local/pureftpd/sbin/pure-config.pl
• /usr/local/www/logs/httpd_log
• /usr/local/Zend/etc/php.ini
• /usr/sbin/pure-config.pl
• /var/adm/log/xferlog
• /var/apache2/config.inc
• /var/apache/logs/access_log
• /var/apache/logs/error_log
• /var/cpanel/cpanel.config
• /var/lib/mysql/my.cnf
• /var/lib/mysql/mysql/user.MYD
• /var/local/www/conf/php.ini
• /var/log/apache2/access_log
• /var/log/apache2/access.log
• /var/log/apache2/error_log
• /var/log/apache2/error.log
• /var/log/apache/access_log
• /var/log/apache/access.log
• /var/log/apache/error_log
• /var/log/apache/error.log
• /var/log/apache-ssl/access.log
• /var/log/apache-ssl/error.log
• /var/log/auth.log
• /var/log/boot
• /var/htmp
• /var/log/chttp.log
• /var/log/cups/error.log
• /var/log/daemon.log
• /var/log/debug
• /var/log/dmesg
• /var/log/dpkg.log
• /var/log/exim_mainlog
• /var/log/exim/mainlog
• /var/log/exim_paniclog
• /var/log/exim.paniclog
• /var/log/exim_rejectlog
• /var/log/exim/rejectlog
• /var/log/faillog
• /var/log/ftplog
• /var/log/ftp-proxy
• /var/log/ftp-proxy/ftp-proxy.log
• /var/log/httpd/access_log
• /var/log/httpd/access.log
• /var/log/httpd/error_log
• /var/log/httpd/error.log
• /var/log/httpsd/ssl.access_log
• /var/log/httpsd/ssl_log
• /var/log/kern.log
• /var/log/lastlog
• /var/log/lighttpd/access.log
• /var/log/lighttpd/error.log
• /var/log/lighttpd/lighttpd.access.log
• /var/log/lighttpd/lighttpd.error.log
• /var/log/mail.info
• /var/log/mail.log
• /var/log/maillog
• /var/log/mail.warn
• /var/log/message
• /var/log/messages
• /var/log/mysqlderror.log
• /var/log/mysql.log
• /var/log/mysql/mysql-bin.log
• /var/log/mysql/mysql.log
• /var/log/mysql/mysql-slow.log
• /var/log/proftpd
• /var/log/pureftpd.log
• /var/log/pure-ftpd/pure-ftpd.log
• /var/log/secure
• /var/log/vsftpd.log
• /var/log/wtmp
• /var/log/xferlog
• /var/log/yum.log
• /var/mysql.log
• /var/run/utmp
• /var/spool/cron/crontabs/root
• /var/webmin/miniserv.log
• /var/www/log/access_log
• /var/www/log/error_log
• /var/www/logs/access_log
• /var/www/logs/error_log
• /var/www/logs/access.log
• /var/www/logs/error.log
• ~/.atfp_history
• ~/.bash_history
• ~/.bash_logout
• ~/.bash_profile
• ~/.bashrc
• ~/.gtkrc
• ~/.login
• ~/.logout
• ~/.mysql_history
• ~/.nano_history
• ~/.php_history
• ~/.profile
• ~/.ssh/authorized_keys
• ~/.ssh/id_dsa
• ~/.ssh/id_dsa.pub
• ~/.ssh/id_rsa
• ~/.ssh/id_rsa.pub
• ~/.ssh/identity
• ~/.ssh/identity.pub
• ~/.viminfo
• ~/.wm_style
• ~/.Xdefaults
• ~/.xinitrc
• ~/.Xresources
• ~/.xsession