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 ancd1111EOF
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
