Linux+Mysql

less /etc/login.defs |grep -i "pa"
less /etc/shadow
less /etc/login.defs
less /etc/pam.d/system-auth
less /etc/security/pwquality.conf
less /etc/pam.d/common-auth
less /etc/profile |grep "TMOUT" #适合UOS
less /etc/ssh/sshd_config | grep "ClientAliveInterval"

less /etc/pam.d/sshd
ssh -V
ps -aux |grep "sshd"
ls -a1 /etc/passwd
passwd -S root
less /etc/passwd |grep "bin/bash"
cat /etc/profile | grep "umask"
more /etc/selinux/config

more /var/log/messages
more /etc/profile
more /etc/shadow
more /etc/passwd
less /etc/selinux/config
systemctl status rsyslog
systemctl status auditd
tail -10 /var/log/audit/audit.log
yum list installed |grep "java" 或者rpm -qa dpkg -l
yum check-update
netstat -antup
cat /etc/redhat-release or cat /etc/issue

===========================================================================

数据库
身份鉴别：
select user,host from mysql.user;
select * from mysql.user where length(password)=0 or
password is null；

show variables like 'validate%';
show VARIABLES like '%password'
show VARIABLES like 'DEFAULT%'

show variables like "%max_connect_errors%";
show variables like "%timeout%";

show variables like "%have_ssl%";
show grants for 'mysql.sys'@'localhost';
show variables like "log_%";
show variables like "%general%";
show variables like "%version%";
show variables like "%sha%";