【586】Terminal 使用 for 语句

参考：How to search for all the files starting with the name “ABC” in a directory?

参考：Terminal Commands: For loop with echo

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• 使用变量的时候需要 ${i} 这样包围住

• {01..10}, {1..10} 是不一样，前者默认前面都加 0，真是方便，随意

　　基本语法：

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for i in ...; do ...; done   or   for i in ... do ... done

　　输出连续数字举例：

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for i in {0..10}; do echo ${i}; done 0 1 2 3 4 5 6 7 8 9 10

　　or

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for i in {0..10} do echo ${i} done 0 1 2 3 4 5 6 7 8 9 10

　　批量创建空文件举例：

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for i in {01..10}; do touch text_${i}.txt; done   # 生成文件   text_01.txt text_02.txt text_03.txt text_04.txt text_05.txt text_06.txt text_07.txt text_08.txt text_09.txt text_10.txt

　　批量修改文件名称举例：

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for f in $(ls); do mv ${f} alex_${f}; done   # 生成文件   alex_text_01.txt alex_text_02.txt alex_text_03.txt alex_text_04.txt alex_text_05.txt alex_text_06.txt alex_text_07.txt alex_text_08.txt alex_text_09.txt alex_text_10.txt