I was just wondering what command i need to put into the terminal to read a text file, eliminate all lines that do not contain a certain keyword, and then print those lines onto a new file. for example, the keyword is "system". I want to be able to print all lines that contain system onto a new separate file. Thanks
我只是想知道，我需要把什么命令放到终端来读取文本文件，删除所有不包含某个关键字的行，然后将这些行打印到一个新文件上。例如，关键字是“system”。我希望能够将包含系统的所有行打印到一个新的独立文件中。谢谢
4 个解决方案
#1
18
grep is your friend.
grep是你的朋友。
For example, you can do:
例如，你可以这样做:
grep system <filename> > systemlines.out
man grep and you can get additional useful info as well (ex: line numbers, 1+ lines prior, 1+lines after, negation - ie: all lines that do not contain grep, etc...)
你也可以得到更多有用的信息(例如:行号，前一行+行，后一行+行-例如:所有不包含grep的行，等等)
If you are running Windows, you can either install cygwin or you can find a win32 binary for grep as well.
如果您正在运行Windows，您可以安装cygwin，也可以为grep找到win32二进制文件。
#2
3
grep '\<system\>'
Will search for lines that contain the word system, and not system as a substring.
将搜索包含单词system而不是system作为子字符串的行。
#3
2
below grep command will solve ur problem
下面的grep命令将解决您的问题
grep -i yourword filename1 > filename2
with -i for case insensitiveness
和-我的情况不敏感。
without -i for case sensitiveness
没有-i的病例敏感性
to learn how grep works on ur server ,refer to man page on ur server by the following command
要了解grep在ur服务器上的工作方式，请通过以下命令参阅ur服务器上的man页面
man grep
#4
-1
grep "system" filename > new-filename
grep“system”文件名>新文件名
You might want to make it a bit cleverer to not include lines with words like "dysystemic", but it's a good place to start.
你可能想让它更聪明一点，不包括像“dy系统性”这样的词，但这是一个很好的开始。
#1
18
grep is your friend.
grep是你的朋友。
For example, you can do:
例如，你可以这样做:
grep system <filename> > systemlines.out
man grep and you can get additional useful info as well (ex: line numbers, 1+ lines prior, 1+lines after, negation - ie: all lines that do not contain grep, etc...)
你也可以得到更多有用的信息(例如:行号，前一行+行，后一行+行-例如:所有不包含grep的行，等等)
If you are running Windows, you can either install cygwin or you can find a win32 binary for grep as well.
如果您正在运行Windows，您可以安装cygwin，也可以为grep找到win32二进制文件。
#2
3
grep '\<system\>'
Will search for lines that contain the word system, and not system as a substring.
将搜索包含单词system而不是system作为子字符串的行。
#3
2
below grep command will solve ur problem
下面的grep命令将解决您的问题
grep -i yourword filename1 > filename2
with -i for case insensitiveness
和-我的情况不敏感。
without -i for case sensitiveness
没有-i的病例敏感性
to learn how grep works on ur server ,refer to man page on ur server by the following command
要了解grep在ur服务器上的工作方式，请通过以下命令参阅ur服务器上的man页面
man grep
#4
-1
grep "system" filename > new-filename
grep“system”文件名>新文件名
You might want to make it a bit cleverer to not include lines with words like "dysystemic", but it's a good place to start.
你可能想让它更聪明一点，不包括像“dy系统性”这样的词，但这是一个很好的开始。