📌 学习笔记 ：本文为学习与实践过程中整理的技术笔记，内容梳理自官方文档与网络公开资料，主要用于知识沉淀与命令速查。
service nginx reload
反向代理，负载均衡
硬件资源信息 1 2 3 4 free -h df -h w top cat /proc/cpuinfo
防火墙 保护服务器，设置防火墙规则，开闭端口
1 2 3 4 yum install firewalld service firewalld start service firewalld status service firewalld stop/disable
服务 1 2 3 4 crontab Ntpdate Logrotate supervisor
网络 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 scp ssh ifconfig netstat dig host root@tj:~/testt# host -t AAAA imwl.cf imwl.cf has IPv6 address 2606:4700:3035::ac43:a0c6 imwl.cf has IPv6 address 2606:4700:3033::6815:eed root@tj:~/testt# host imwl.cf imwl.cf has address 172.67.160.198 imwl.cf has address 104.21.14.237 imwl.cf has IPv6 address 2606:4700:3033::6815:eed imwl.cf has IPv6 address 2606:4700:3035::ac43:a0c6 curl -d '{"x" : 1}' -H "Content-Type: application/json" -X POST http://localhost:3000/api
securtCRT 提示
key_exchange_failed
1 2 3 4 5 vi /etc/ssh/sshd_config #加入下面的文本 KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 #重启ssh systemctl restart sshd.service
nfs 使用
1 2 3 4 5 6 7 8 9 10 11 # 主节点 192.168.2.134 mkdir -p /data/nfs/direct_mount mkdir /mnt/nfs/ echo "/data/nfs *(rw,no_root_squash,no_all_squash,sync)" >> /etc/exports systemctl enable nfs --now mount -t nfs 192.168.2.134:/data/nfs/direct_mount /mnt/nfs/ # 其他节点 mkdir /mnt/nfs/ systemctl enable nfs --now mount -t nfs 192.168.2.134:/data/nfs/direct_mount /mnt/nfs/
切割 2G 大小
1 split -b 2G harbor.tar harbor.tar_LF_
合并
1 cat harbor.tar_LF_* > harbor.tar