linux向文件写入内容cat << EOF

向文件追加内容 不改变原有内容

cat << EOF >> /etc/redis.conf

cat << EOF >> /etc/redis.conf
#######################config redis password##############
requirepass ancd1111
EOF

向文件写入 覆盖原有内容

cat << EOF > 单号覆盖原有

cat << EOF > /etc/nginx/nginx.conf
###############nginx.conf##############
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile      on;
    keepalive_timeout  65;
    ########httpserver1#######
    server {
        listen       80;
        server_name  ratelie.com;
        ########httpserver#######
        location / {
            root   /usr/share/nginx/html;
            index  index.html index.htm;
            try_files \$uri \$uri/ /index.html;
        }
        ########httpserver#######
        location /api/ {
            proxy_set_header Host \$http_host;
            proxy_set_header X-Real-IP   \$remote_addr;
            proxy_set_header REMOTE-HOST \$remote_addr;
            proxy_set_header X-Real-PORT \$remote_port;
            proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
            proxy_pass http://127.0.0.1:20001/;
        }
    }
    ########httpserver1 end#######
}
###############nginx.conf##############
EOF

cat << EOF > 写入内容遇到特殊符号 需要转义