34
I'm currently having problems to execute a command from a shell variable.
In general the following works as expected:
COMMAND="echo A"
echo $COMMAND
$COMMAND
produces:
echo A
A
But if I do
COMMAND="su aUser -s /bin/bash -c 'echo A'"
echo $COMMAND
$COMMAND
I get
su aUser -s /bin/bash -c 'echo A'
Password:
A': -c: line 0: unexpected EOF while looking for matching `''
A': -c: line 1: syntax error: unexpected end of file
If I enter the line
su aUser -s /bin/bash -c 'echo A'
directly it works as expected.
It seems my assumption that $COMMAND is equal to entering the content as command directly is wrong.
Questions
1) Does anyone know how I can run the command from a variable?
2) What exactly is the difference between
COMMAND="command"
$COMMAND
and
command
?