tr print

SHELL script-full explanation of tr command usage and features, shell script-tr usage Directory:1.1 Introduction1.2 tr ing1.3 completely matched replacement1.4 compressed symbols1.5 Delete symbols and supplements 1.1 Introduction Tr is mainly used

1. About tr By using TR, you can easily implement many basic sed functions. You can view tr as SED (Extremely) Simplified variant: it can replace another character with one character, or it can completely remove some characters. You can also use it

This article directory:1.1 Introduction1.2 TR Mapping1.3 Completely corresponding replacement1.4 Compression Symbols1.5 deleting symbols and complement sets1.1 IntroductionTR is primarily used for result set mapping, character compression, and

Tr is short for translate. With this word, you can probably guess what it is! Yes, it can replace another string with one character string, or it can completely remove some characters. You can also use it to remove duplicate characters. Tr is used

TR conversion, compression, truncation, deletion of characters tr [OPTION].....SET1 [Set2] Parameters: -D,--Delete Deletes the character in string 1 without converting. -S,--squeeze-repeats Compresses the recurring string into a string.

Although the contact with Linux for several years, but never used the TR command before learning to find that it is actually a very simple but very useful text processing tool.First look at the man's description of it:NAME tr - translate or

A Cat 1.cat file1 file2 file3 ... 2. Use a pipe to read from the standard input: echo "Hadoop hive!" | Cat–file.txt 3. Compress Blank Lines (1) Compress multiple continuous whitespace behaviors single Cat-s file (2) Remove blank lines Cat File.txt |

Stream Editor: sedSed ' s/pattern/replace_string/' file #从给定文本中的字符串利用正则表达式进行匹配并替换每一行中第一次符合样式的内容Sed ' s/text/replace/' file > NewFile #替换每一行中第一次符合样式的内容并将替换结果重定向到新文件Sed-i ' s/test/replace/' file #参数-I use to replace the content result of the first

Reprint: http://blog.sina.com.cn/s/blog_4a0824490101hncz.html(1)/C means to replace the characters that are not matched.$temp = "Aaaabcdef";$count = $temp =~tr/a/h/c;Print "$temp \t$count\n";Results: Aaaahhhhh 5(2)/d: Replace all characters on the

IntroductionThe TR command can replace, compress, and delete characters from standard input. It can turn a set of characters into another set of characters.GrammarTR [OPTION] ... SET1 [SET2]Note: SET2 is optionalOPTION:without parameters: replace