在双引号前添加“\”来转义，而不是\

#! /bin/csh -f

set dbtable = balabala

set dbload = "load data local infile "\""'gfpoint.csv'"\"" into table $dbtable FIELDS TERMINATED BY ',' ENCLOSED BY '"\""' LINES TERMINATED BY "\""'\n'"\"" IGNORE 1 LINES"

echo $dbload
# load data local infile "'gfpoint.csv'" into table balabala FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY "''" IGNORE 1 LINES

检查printf…

#!/bin/bash
mystr="say \"hi\""

不使用printf

echo -e $mystr

输出:说“hi”

使用printf

echo -e $(printf '%q' $mystr)

输出:say“hi”

请记住，可以通过使用需要回显的字符的ASCII码来避免转义。

例子:

echo -e "This is \x22\x27\x22\x27\x22text\x22\x27\x22\x27\x22"
This is "'"'"text"'"'"

\x22是用于双引号的ASCII码(十六进制)，\x27用于单引号。同样，您可以回显任何字符。

我想如果我们尝试用反斜杠回显上面的字符串，我们将需要一个混乱的两行反斜杠回显…：）

对于变量赋值，这是等价的:

a=$'This is \x22text\x22'
echo "$a"

# Output:
This is "text"

如果变量已经由另一个程序设置，您仍然可以使用sed或类似工具应用双引号/单引号。

例子:

b="Just another text here"
echo "$b"

 Just another text here

sed 's/text/"'\0'"/' <<<"$b" #\0 is a special sed operator
 Just another "0" here #this is not what i wanted to be

sed 's/text/\x22\x27\0\x27\x22/' <<<"$b"

 Just another "'text'" here #now we are talking. You would normally need a dozen of backslashes to achieve the same result in the normal way.

一个在shell中转义引号的简单例子:

$ echo 'abc'\''abc'
abc'abc
$ echo "abc"\""abc"
abc"abc

它是通过完成一个已经打开的(')，放置转义的(\')，然后打开另一个(')来完成的。

另外:

$ echo 'abc'"'"'abc'
abc'abc
$ echo "abc"'"'"abc"
abc"abc

它是通过结束已经打开的一个(')，在另一个引号(“'”)中放置一个引号，然后打开另一个(')来完成的。

更多示例:在单引号字符串中转义单引号

将双引号字符存储在变量中:

dqt='"'
echo "Double quotes ${dqt}X${dqt} inside a double quoted string"

输出:

Double quotes "X" inside a double quoted string

使用反斜杠:

echo "\""     # Prints one " character.