sed: -e expression #1, char 0: unmatched `{'

phoebe_y_wang

为什么执行下面的命令时会报错误 sed: -e expression #1, char 0: unmatched `{'

sed -i '/Removing/{n;a\\--->test;}' a.txt

Perl_Er

1. The syntax of these commands is unusual for sed because they must be specified over multiple lines. The syntax follows:
   
2. 
   
3. append [line-address]a\
   
4. text
   
5. insert [line-address]i\
   
6. text
   
7. change [address]c\
   
8. text
   
9. 
   

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回复 1# phoebe_y_wang


   

phoebe_y_wang

恩，谢谢指点哦~明白啦，试了一下分行，OK的，那我想要加一个这样的带双引号字符串： “/home/phoebe",  应该怎么写呢？
会遇到这样的错误：sed: -e expression #1, char 22: unknown command: `"'

回复 2# Perl_Er


   

winway1988

1. sed -i '/Removing/{n;a "\/home\/phoebe"
   
2. > }'

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phoebe_y_wang

没错，cool，谢楼上~ (∩_∩)回复 4# winway1988


   

英语盲学linux

其实用 s/$/\n xxxxxx/ 也挺好的

g_programming

回复 2# Perl_Er


    我想问一下，我看到书上的语法也是必须在a,i,c后加\，然后在下一行输入
但是我测试

1. sed '/str/aSTR' file
   
2. sed '/str/a\STR' file
   
3. 
   

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都行呢

g_programming

回复 4# winway1988


    不是a后面必须跟\,而且必须分行吗？？

Perl_Er

1. Each of these commands requires a backslash following it to escape the first end-of-line. The text must begin on the next line. To input multiple lines of text, each successive line must end with a backslash, with the exception of the very last line. For example, the following insert command inserts two lines of text at a line matching "<Larry's Address>":
   
2. 
   
3. /<Larry's Address>/i\
   
4. 4700 Cross Court\
   
5. French Lick, IN
   
6. Also, if the text contains a literal backslash, add an extra backslash to escape it.[5]
   
7. 
   

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回复 7# g_programming


   

g_programming

回复 9# Perl_Er


    我看了的 它说这些命令每个都要求后面跟一个反斜杠用于转义第一个行尾，text必须从下一行开始，这就是说

1. sed '/str/aSTR' file
   
2. 
   
3. sed '/str/a\STR' file

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都是不满足语法的 但是确实能够执行啊？
我不知道我说对没？谢