bash sed 错误抱怨“命令后的额外字符”
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时间：2020-09-18 10:42:03 来源:igfitidea点击:
sed error complaining "extra characters after command"
提问by Daniel
#!/bin/bash
# Let's say now, we are working in my $HOME directory
# Content of testfile (originally)
# 123456
# ABCDEF
# /home/superman
string="ABCDEF"
myfile="$HOME/testfile"
# test-1, this is okay
sed -i "/$string/d" $myfile
echo $string >> $myfile
# test-2, this fails
# ERROR (sed: -e expression #1, char 4: extra characters after command)
sed -i "/$PWD/d" $myfile
echo $PWD >> $myfile
# Not working either
sed -i ":$PWD:d" $myfile
echo $PWD >> $myfile
My question: How to handle the $PWD situation?
我的问题：如何处理 $PWD 的情况？
回答by evil otto
To use the alternate delimiters for addresses, you need to use backslash - \
要使用地址的备用分隔符，您需要使用反斜杠 - \
sed "\:$PWD:d" < $myfile
Should work.
应该管用。
Of course for this exact example, grep -vis probably easier.
当然对于这个确切的例子，grep -v可能更容易。
