从书上抄的个shell脚本 sleep.sh
如下：
echo -n count:
tput sc
count=0;
while true;
do
if [ $count -lt 40 ]
then let count++;
sleep 1;
tput rc
tput ed
echo -n $count;
else exit 0;
fi
done
~
执行后报错：
count:./sleep.sh: line 8: syntax error near unexpected token `then'
./sleep.sh: line 8: ` then let count++;'
刚开始学习对shell脚本语法不清楚，原因如下：
1.if后要有空格
2.[] 中括号的开头和结尾要有空格！
3. [ $count -lt 40 ]中括号中的$1和-eq和"root"之间不需要空格！
========================
echo -n count:
tput sc
count=0;
while true;
do
if [ $count-lt40 ]
then let count++;
sleep 1;
tput rc
tput ed
echo -n $count;
else exit 0;
fi
done