bash 从bash中的for循环回显变量名称，而不是值？
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Echo variable name, not value, from for loop in bash?
提问by cashman04
a=1
b=2
c=3
for db in $a $b $c; do
echo VARIABLE NAME
blah
blah
blah
I need this for a script I am writing. I have some Client names set at the top to database names for the varialble. I am running a ps -ef and a few other things, but I need it to echo out which client name it is on in the loop. So in example above, it would echo out "a", then its other commands, then on the second loop echo "b" .....etc
我需要这个用于我正在编写的脚本。我在顶部为变量的数据库名称设置了一些客户端名称。我正在运行 ps -ef 和其他一些东西，但我需要它来回显循环中它所在的客户端名称。所以在上面的例子中，它会回显“a”，然后是它的其他命令，然后在第二个循环中回显“b”.....等
回答by choroba
Use variable indirection:
使用变量间接：
for var in a b c ; do
echo $var ${!var}
done
