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教媳妇写代码

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linux常用命令

根据易读的单位大小比较,比如 2K、1G -g:按照常规数值排序 -n:根据字符串数值比较 -r:倒序排序 -k:位置1,位置2根据关键字排序,在从第位置1开始,位置2结束 -t:指定分隔符 -u:去重重复行 -o:...-o:只输出文件中匹配到的部分。 –color=auto:将匹配到的字符串高亮出来。...: 零个或一个a a+ : 一个或多个a .* : 任意多个任意字符 \. : 转义. o\{2\} : o重复两次 [A-Z] [ABC] 查找不是以#开头的行 grep -v '^#' grep.txt...test.txt /home/linux/txt/hw.txt /home/linux/txt/sort.txt 另一种写法:find /home/linux/txt/ -name "*.txt" -o...[root@hadoop ~]# echo $WEBSITE | cut -c 1,4 hp 11、获取最后几个字符 [root@hadoop ~]# echo ${WEBSITE:(-3)} 结果:tml

2.1K10

微信小程序中- pagescardcard.wxss 中的本地资源图片无法通过 WXSS 获取-解决办法

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