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试图写一个bash,如果定义了环境变量中指定要使用的命令。这样做如下:Bash没有这样的文件或目录
if [ -z $MY_DIFF ];
then
echo Using standard diff $(which diff), change MY_DIFF env variable to use a different one.
echo $(which diff)
$diffv=$(which diff)
else
$diffv=$MY_DIFF
fi
$diffv c.xml c2.xml
但我发现了:
./bash.sh: line 10: =/opt/gnu/bin/diff: No such file or directory
./bash.sh: line 13: c.xml: command not found
我敢肯定,该文件存在,我也有权执行。任何想法可能是什么问题?
您可以包括行号更清楚地显示在错误指向? –
您在diff路径前有一个'='。 – blackSmith
请勿在作业左侧使用$(在脚本上运行时,这是从[ShellCheck](http://www.shellcheck.net)输出的文字)。 –