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# info
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# 脚本测试
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curl -Lso- https://raw.githubusercontent.com/oooldking/script/master/superbench.sh  bash
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# 看开放的端口
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netstat -lntup
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# 看有连接的端口
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netstat -ant
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# 看进程
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ps aux
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htop
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# 搜索文件 位置 and 条件
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find / -name *.sh
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# 搜索目录内的指定文本内容 grep -irn "条件" 位置
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grep -irn "rsa" /root/.ssh
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grep -irn PasswordAuthentication /etc/ssh/sshd_config

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# DNS
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# 国外
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cat > /etc/resolv.conf<<-EOF
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nameserver 8.8.8.8
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nameserver 1.1.1.1
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options timeout:1 rotate
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EOF
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# 国内
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cat > /etc/resolv.conf<<-EOF
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nameserver 223.5.5.5
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nameserver 114.114.114.114
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options timeout:1 rotate
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EOF
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# 查看本机外网IP
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curl myip.ipip.net
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# 查看指定端口占用
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netstat -tunlp grep 22

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# Centos7
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yum -y install net-tools git wget
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# 升级软件
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yum --exclude=kernel* update
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# 升级软件+内核
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yum -y update

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# SSH
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# 开启密码登录
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sed -i 's/^.*PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config;
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# 禁用密码登录
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if [ -z "grep ^PasswordAuthentication /etc/ssh/sshd_config" ]; then
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sed -i "s@^#PasswordAuthentication.*@&\nPasswordAuthentication no@" /etc/ssh/sshd_config
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else
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sed -i "s@^PasswordAuthentication.*@PasswordAuthentication no@" /etc/ssh/sshd_config
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fi
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# 重启sshd服务
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service sshd restart;
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/etc/init.d/ssh restart;
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# 查看当前ssh端口
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grep ^Port /etc/ssh/sshd_config  awk '{print $2}'

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# 场景列表
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screen -list
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# 安装场景
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yum -y install screen
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# 恢复场景
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screen -r asf
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# 创建场景
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screen -S asf

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# bitwarden
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docker pull bitwardenrs/server:latest
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docker kill bitwarden
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docker rm bitwarden
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docker run -d --name bitwarden -v /home/bwdata/:/data/ -p 3000:80 bitwardenrs/server:latest
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#docker logs --tail 30 -f bitwarden
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docker logs bitwarden
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# -----------
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docker image ls
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docker image rm 多余的镜像

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# Linux-NetSpeed
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bash <(curl -fsL mcnb.top/tcp.sh)
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# debian 8+ 开启bbr
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echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
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echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
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sysctl -p
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# 观察BBR是否开启成功，执行以下代码：
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sysctl net.ipv4.tcp_available_congestion_control && sysctl net.ipv4.tcp_congestion_control && lsmod  grep bbr
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# 反馈结果都有bbr, 则证明你的内核已开启bbr