問(wèn)題：
## ubuntu 18.04
apt install nodejs
E: 無(wú)法獲得鎖 /var/lib/dpkg/lock-frontend - open (11: 資源暫時(shí)不可用)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
原因：apt update后提示有多個(gè)軟件包可以升級(jí)拣凹。軟件包未升級(jí)結(jié)束。
解決：多執(zhí)行幾次apt update再apt install
問(wèn)題：nginx重啟異常
/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
/usr/local/nginx/sbin/nginx -s reload
