摘要:
一、判断 语法 if condition1 then command1 elif condition1 then command2 else command3 fi 合并成一行 if [ condition1 ]; then command1; elif [ condition1 ]; then c 阅读全文
摘要:
处理方式:逐行处理 处理类型:增删改查 文件demo: test.txt this is a test str. is 1 is 2 is 3 is 4 is 5 is 6 is 7 is 81234qwer -i 参数直接修改文件 插入选中行下一行文本, 开始标识字符 a\, 前置为选中行索引 s 阅读全文