Dear all:
According to the reference document, colon, ":", in bash is used as null
command and I can realize this by following example:
if condition
then : # Do nothing and branch ahead
else
take−some−action
fi
But how about the following ex1 and ex2 mean?
Ex1:
: ${username=`whoami`}
${username=`whoami`}
Ex2:
: $((n = $n + 1))
(( n = n + 1 ))
Appreciate your help,
vichy
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