Ugh. I found the prior answers a bit wanting for a few reasons: in particular, they don't resolve multiple levels of symbolic links, and they are extremely "Bashy". While the original question does ex...
shell 脚本中,通常会使用相对路径来做处理,但有时候,我们也许需要用到绝对路径。 在shell怎么获取一个文件或目录的绝对路径呢? 也许你会立马想到realpath(如果你写过php的话),那么shell支持这个命令吗?看一下这里你就知道了。 Realpath appears to come from debian, and is not part of coreutils,Rea...
These two collations are both for the UTF8 character encoding. The differences are in how text is sorted and compared._Note: Since MySQL 5.5.3 you should use rather than `utf8`. They both refer ...
1.utf8与utf8mb4(utf8 most bytes 4) MySQL 5.5.3之后增加了utfmb4字符编码 支持BMP(Basic Multilingual Plane,基本多文种平面)和补充字符 最多使用四个字节存储字符utf8mb4是utf8的超集并完全兼容utf8,能够用四个字节存储更多的字符。标准的UTF8字符集编码是可以使用14个字节去编...
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