Linux - 从第二个选项卡获取文本
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Linux - get text from second tab
提问by bandit
Suppose that we have file like this:
假设我们有这样的文件：
sometext11 sometext12 sometext13 sometext21 sometext22 sometext23
sometext11 sometext12 sometext13 sometext21 sometext22 sometext23
Texts are separated by tabs and we know sometext from column 1 but want to get text from column 2. I know I can get line by:
文本由制表符分隔，我们知道第 1 列中的一些文本，但想要从第 2 列中获取文本。我知道我可以通过以下方式获取行：
grep 'sometext11' file.txt
How to get text from second column? Maybe some tool with option -t [column nr]?
如何从第二列获取文本？也许一些带有选项 -t [column nr] 的工具？
采纳答案by Fredrik Pihl
awk:
awk：
awk '{print }' file.txt
cut:
切：
cut -f2 file.txt
bash:
重击：
while read -a A; do echo ${A[1]}; done < file.txt
perl:
珀尔：
perl -lane 'print $F[1]' file.txt
If you know the string you are grepping for, you can use grep:
如果您知道要搜索的字符串，则可以使用grep：
grep -o 'sometext12' file.txt
回答by Gryphius
awk '{print }' < yourfile
回答by Paused until further notice.
You don't need grep:
你不需要grep：
awk '/sometext11/ {print }' file.txt
or you can do it all in grepif yours supports Perl Compatible Regular Expressions (PCRE), such as GNU or OS X grep:
或者，grep如果您的支持 Perl 兼容正则表达式 (PCRE)，例如 GNU 或 OS X ，则您可以全部完成grep：
grep -Po '(?<=sometext11\t).*?(?=\t.*)' file.txt
