Linux 如何从给定的文本文件中删除所有空格
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How to remove all white spaces from a given text file
提问by Lunar Mushrooms
I want to remove all the white spaces from a given text file. Is there any shell command available for this ? Or, how to use sedfor this purpose.
我想从给定的文本文件中删除所有空格。是否有任何可用的 shell 命令？或者，如何sed用于此目的。
I want something like below:
我想要像下面这样的东西：
$ cat hello.txt | sed ....
$ 猫你好.txt | sed ....
I tried this : cat hello.txt | sed 's/ //g'.But it removes only spaces, not tabs.
我试过这个：cat hello.txt | sed 's/ //g'。但它只删除空格，而不是制表符。
采纳答案by Paulo Scardine
$ man tr
NAME
tr - translate or delete characters
SYNOPSIS
tr [OPTION]... SET1 [SET2]
DESCRIPTION
Translate, squeeze, and/or delete characters from standard
input, writing to standard output.
In order to wipe all whitespace including newlines you can try:
为了擦除包括换行符在内的所有空白，您可以尝试：
cat file.txt | tr -d " \t\n\r"
You can also use the character classes defined by tr (credits to htompkinscomment):
您还可以使用 tr 定义的字符类（归功于htompkins评论）：
cat file.txt | tr -d "[:space:]"
For example, in order to wipe just horizontal white space:
例如，为了只擦除水平空白区域：
cat file.txt | tr -d "[:blank:]"
回答by Jerry Coffin
hmm...seems like something on the order of sed -e "s/[ \t\n\r\v]//g" < hello.txtshould be in the right ballpark (seems to work under cygwin in any case).
嗯......似乎sed -e "s/[ \t\n\r\v]//g" < hello.txt应该在正确的范围内（似乎在任何情况下都可以在 cygwin 下工作）。
回答by keyser
回答by Umae
I think you may use sed to wipe out the space while not losing some infomation like changing to another line.
我认为您可以使用 sed 来清除空间，同时不会丢失一些信息，例如更改为另一行。
cat hello.txt | sed '/^$/d;s/[[:blank:]]//g'
回答by Lucie G
Much simpler to my opinion:
我的看法要简单得多：
sed -r 's/\s+//g' filename
回答by glenn Hymanman
If you want to remove ALLwhitespace, even newlines:
如果要删除所有空格，甚至是换行符：
perl -pe 's/\s+//g' file
回答by Gorton Fishman
This is probably the simplest way of doing it:
这可能是最简单的方法：
sed -r 's/\s+//g' filename > output
mv ouput filename
回答by user3653982
Try this:
尝试这个：
tr -d " \t" <filename
See the manpage for tr(1) for more details.
有关更多详细信息，请参阅 tr(1) 的联机帮助页。
回答by mminski
Easiest way for me ->
对我来说最简单的方法->
echo "Hello my name is Donald" | sed s/\ //g
回答by Agnibesh Chauhan
Dude, Just python test.py in your terminal.
伙计，只需在终端中使用 python test.py 即可。
f = open('/home/hduser/Desktop/data.csv' , 'r')
x = f.read().split()
f.close()
y = ' '.join(x)
f = open('/home/hduser/Desktop/data.csv','w')
f.write(y)
f.close()
