sed错误，抱怨“命令后有额外字符”

Question

#!/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

我的问题是：如何处理$PWD的情况？

- Daniel

Answer 1

为了使用备用分隔符来处理地址，您需要使用反斜杠 - \。

sed "\:$PWD:d" < $myfile

应该可以工作。

当然，对于这个确切的例子，grep -v 可能更容易。

- evil otto