LMLPHP后院

使用 pacman 更新系统报错怎么办？更新是个麻烦事，长时间不更新一更新就容易出各种问题。

pacman -Syu error: audit: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust

error: audit: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/audit-2.8.4-2-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: libtiff: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/libtiff-4.0.10-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: autoconf-archive: signature from "Eli Schwartz <eschwartz@archlinux.org>" is unknown trust
:: File /var/cache/pacman/pkg/autoconf-archive-1:2019.01.06-1-any.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: ctags: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/ctags-1:r20181015+g45968eff-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: patch: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/patch-2.7.6-7-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: vim-runtime: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/vim-runtime-8.1.0751-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: gvim: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/gvim-8.1.0751-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: libplacebo: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/libplacebo-1.7.0-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: strongswan: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/strongswan-5.7.1-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: aribb24: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/aribb24-1.0.3-2-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: vlc: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/vlc-3.0.6-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: wget: signature from "Levente Polyak (anthraxx) <levente@leventepolyak.net>" is unknown trust
:: File /var/cache/pacman/pkg/wget-1.20.1-1-x86_64.pkg.tar.xz is corrupted (invalid or corrupted package (PGP signature)).
Do you want to delete it? [Y/n] n
error: failed to commit transaction (invalid or corrupted package)
Errors occurred, no packages were upgraded.

如何把 windows 装进优盘，本篇给你帮助。

啰嗦一点，其实从 win8 开始微软 windows 操作系统对于优盘的支持好了很多，装进优盘那是非常方便的，直接 dd 一个命令就刻录好了 U 盘安装盘，直接装就可以了。但是为什么我不选择 win10 装进 U 盘呢？你想，你都用 win10 了，那肯定是新电脑，当然没有这个必要啦。对于我这种拥有老古董机器的人来说，win7 比较适合；而另外一个原因就是 win10 对于硬件的要求太高，即使装成功了，在 USB 口的老机器上仍然是启动不了的，只能是卡在开机 logo 那里转圈圈。

对于 win7 以及以下的操作系统装进 U 盘里面是比较难的。不像 Linux 系列发行版那样的友好。win7 的安装盘无法识别 USB 存储介质，所以安装盘本身需要添加驱动支持。

偶尔碰到这样一个错误，记录下

bash: git-upload-pack: command not foundfatal: Could not read from remote repository.Please make sure you have the correct access rightsand the repository exists.

微信开发入门的大坑，微信官方建议开启服务器加密配置，但官方 SDK 给出错误的代码示例，误导开发者。

经过一番折腾，终于成功的实现了加解密和微信通信。

<xml><ToUserName><![CDATA[gh_6d0d825351ee]]></ToUserName><FromUserName><![CDATA[og-TK5kTi8ujOfh36bkTPcQvMCBk]]></FromUserName><CreateTime>1544275857</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[好]]></Content><MsgId>6632614303346723864</MsgId></xml>


<xml><Encrypt><![CDATA[pLqOSM2NZ5Yy/V3fEN5TMhieUoGT8CJ7vKVvhG3Rwmr9lAYD8Dmp6JMp0boP1cfHMx8kmiXpnbZtV+IqvXfQzKwykPASE4GK0Nj4RXumvZ4uUuCPP/0E85BHBy+RvxjvnxturqmAStNiJ55GA/e0aHXxv+ubGoRhXpDN7YGIbPj9JRl34F3sBXEbF71+kgG92NspWz8JryjiGYCrJUrYKtnrio+swAqMxL4i1SEGzg3jvE6xYUtMluLigFcKkEzggk0yxRLSDU7+jFRTCKJPGsJ7XYMH9YsTQ7Uv0j5juiTJ5Mm7APp9pZhvm9vmmTRjleW35gr/PYZDB3qAIm5oP5Ckufi3OSBh9OY+7O5dwquLD1N0t3tOZr5h/NCs0CoF]]></Encrypt><MsgSignature><![CDATA[3bc38303e72bc8c2a603add418e46496521e8405]]></MsgSignature><TimeStamp>1544285690</TimeStamp><Nonce><![CDATA[478380264]]></Nonce></xml>

使用 filesize 获取文件大小需要注意，此函数返回的内容是被缓存的，一般情况下不会出现问题，如果文件内容被频繁更改，那就获取到错误的大小了。

看官方的注释：

返回文件大小的字节数，如果出错返回 FALSE 并生成一条 E_WARNING 级的错误。Note: 因为 PHP 的整数类型是有符号整型而且很多平台使用 32 位整型，对 2GB 以上的文件，一些文件系统函数可能返回无法预期的结果 。Note: 此函数的结果会被缓存。参见 clearstatcache() 以获得更多细节。

filesize 需要配合 clearstatcache() 函数使用。获取文件大小的方法还可以使用 file_get_contents 获取内容，然后使用 strlen 来获取，这样也是准确的。注意不要读取太大的文件，怕引起内容超过限制。