Linux 替换sed中的控制字符
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Replacing Control Character in sed
提问by myahya
I need to replace all occurrences of the control character CTRL+A (SOH/ascii 1) in a text file in linux, how can this be achieved in SED?
我需要在 linux 的文本文件中替换所有出现的控制字符 CTRL+A (SOH/ascii 1)，如何在 SED 中实现？
采纳答案by myahya
This can be done through catwith the -v(equivalently --show-nonprintingoptions and piping this into sed).
这可以通过完成cat与-v（等效--show-nonprinting选项和管道到这一点sed）。
If the control character the start of heading (SOH) character (CTRL+A / ASCII 1), and we want to replace it with a tab, we would do the following:
如果控制字符是标题的开始 (SOH) 字符 (CTRL+A / ASCII 1)，并且我们想用制表符替换它，我们将执行以下操作：
cat -v file | sed 's/\^A/\t/g' > out
cat -vwould replace the SOH character with ^A, which would then be matched and replaced in sed.
cat -v将用 ^A 替换 SOH 字符，然后将匹配并替换为sed.
回答by Martin Ellis
By "replace", I'm assuming you want to change the file 'in-place'.
通过“替换”，我假设您想“就地”更改文件。
Using GNU sed:
使用 GNU sed：
# Create a file with a single control character (SOH)
echo -e "\x01" > file
# Change SOH control characters to the literal string "SOH"
sed -i 's/\x01/SOH/g' file
# Check result
cat file
gives...
给...
SOH
The -ioption doesn't work on OS X sed, so you'd need to work-around that by piping sed to a temporary file.
该-i选项在 OS X sed 上不起作用，因此您需要通过将 sed 管道传输到临时文件来解决该问题。
回答by dogbane
Try:
尝试：
sed 's/^A/foo/g' file
Use Ctrl+V+Ato create the ^Asequence in the above command.
使用Ctrl+ V+A创建^A在上面的命令序列。
回答by William Pursell
What do you want to replace them with? If the replacement is a single character, tris a better choice than sed. To replace with the letter 'a':
你想用什么来代替它们？如果替换为单个字符，tr则是比 更好的选择sed。替换为字母“a”：
tr '' a < input-file > tmp && mv tmp input-file
回答by Suman
You Can use tr command
您可以使用 tr 命令
tr -s '\001' '|' newfile
tr -s '\001' '|' 新文件
tr -s "word or delimiter" want to replace with "word or delimiter" newfile
tr -s "word or delimiter" 想替换为 "word or delimiter" newfile
