LeetCode C++ 1319. Number of Operations to Make Network Connected【BFS/DFS/Union Find】中等
技術標籤：linux
1.目錄授權
為目錄及下級目錄授權所有
chmod -R 777 /opt/cache
2.關閉已知埠對應的程式
在已知埠號的情況下，假如要關閉8015埠
- 找出埠程序，使用以下命令
netstat -anp |grep 8015
- 通過上一步命令，我們已經知道該程序的pid，如圖所示pid位33979，接下來使用以下命令即可
kill -9 33979
3.檢視當前目錄
在當前目錄下使用 pwd
4.建立使用者組，併為指定資料夾授權
建立使用者組 groupadd es 建立使用者並新增至使用者組 useradd es -g es 更改使用者密碼（輸入 123123） passwd es 賦予es使用者操作許可權 chown -R es:es /var/log/elasticsearch/
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