ppk -> pem PuTTY format private key file (.ppk) to OpenSSH (.pem) pem key其實就是openssh的key Download PuttyGen Click on Load Browse to your .ppk file Enter the password Click on Conversions at the top of the screen
昨天,遇到了一個sql異常錯誤資訊:java.sql.SQLException: The used SELECT statements have a different number of columns,sql我自己隨意寫了一個,大概是這樣子: SELECT S.s1 AS n1, S.s2 AS n2, Y.y2 AS n3, S.s3 AS n4FROM SINNER JOIN Y ON S.s1 = Y.y1WHERE S.s4 =
什麼是Json Web Token? Json Web Token (JWT)是一種開放標準(RFC7519),它定義了一種簡單且獨立的方式,用於將各方之間的資訊安全地傳輸為JSON對象。該資訊可以通過數位簽章進行驗證和信任。JWT可以使用一個secret(HMAC演算法)或使用RSA的公開金鑰/私密金鑰對可以對JWT進行簽名。 進一步解釋這個定義的一些概念。
1. Stream初體驗 我們先來看看Java裡面是怎麼定義Stream的: A sequence of elements supporting sequential and parallel aggregate operations. 我們來解讀一下上面的那句話: Stream是元素的集合,這點讓Stream看起來用些類似Iterator; 可以支援順序和並行的對原Stream進行匯聚的操作;
ubuntu apt-get方式安裝nginx 參考 http://nginx.org/en/linux_packages.html 首先 in order to authenticate the nginx repository signature and to eliminate warnings about missing PGP key during installation of the nginx package, it is necessary to add the
Network Configuration TL;DR When Docker starts, it creates a virtual interface named docker0 on the host machine. It randomly chooses an address and subnet from the private range defined by RFC 1918 that are not in use on