Linux常用操作 Linux常用操作Linux常用操作主要包含Shell命令行等命令fail2ban封禁和解封指定IP#fail2ban把IP加入黑名单 fail2ban-client set sshd banip 1.1.1.1 #fail2ban把IP从黑名单移除 fail2ban-client set sshd unbanip 1.1.1.1 返回1为成功，0即表示规则没有发生变化，即操作失败（说明IP本来就在列表或者不在列表中）ulimit参数优化ulimit -a编辑 /etc/security/limits.confroot soft nofile 1024000 root hard nofile 1024000 root soft nproc 1024000 root hard nproc 1024000 * soft nofile 1024000 * hard nofile 1024000 * soft nproc 1024000 * hard nproc 1024000 * soft core unlimited * soft stack 10240立即生效命令：ulimit -uSHDebian12安装常用软件apt install locales-all -y apt install rsyslog -y systemctl start rsyslog systemctl enable rsyslog systemctl restart fail2ban.service systemctl status fail2ban.service apt update apt install command-not-found sudo strace iftop iotop -y apt install vim htop -y apt install netcat-openbsd htop wget curl mtr nmap tcpdump bind9-utils lrzsz rsync git -y apt install sysstatiftop iotop lsof strace -y apt install unzip unrar-free dos2unix tree tmux screen -y apt install nginx php php-fpm nodejs python3-pip redis-server -y apt install composer docker-compose -y apt install inotify-tools -y apt install fail2ban -y apt install php php-{fpm,mysql,curl,zip,xml,gd,mbstring,bcmath,soap,ldap,oauth,redis,yaml,gd,curl,pdo,dom,zip,xml} -y apt install python3-certbot-nginx certbot -ySSL证书常用操作openssl x509 -in /etc/letsencrypt/live/gmork.cc/cert.pem -text