Command& run background
echo hello&
run background
for i in `ls`
do
echo $i
done&
sleep 10&
&& : Cmd1&&Cmd2
echo hello && echo world
Command& run background
echo hello&
run background
for i in `ls`
do
echo $i
done&
sleep 10&
&& : Cmd1&&Cmd2
echo hello && echo world
本文标题：Use of & and &&
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