运行脚本出错，请好心人看看
给脚本get_perform设置权限后运行失败，不知道为什么
Administrator@AS-201210251145 ~/labw/nsp132
$ chmod +x get_perform
Administrator@AS-201210251145 ~/labw/nsp132
$ ./get_perform
./get_perform: line 10: syntax error near unexpected token `elif'
'/get_perform: line 10: `elif ["$i" -le 250 ]; then
get_perform内容为：
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#!/bin/sh
i=1
while [ "$i" -le 300 ]; do
ns w_w.tcl $i
gawk –f delay.awk rate=$i wired_wireless.tr >>delay
gawk –f loss.awk rate=$i wired_wireless.tr >>loss_rate
gawk -f throughtput.awk rate=$i wired_wireless.tr >>throughtput
if ["$i" -le 225 ]; then
i=$(($i+20))
elif ["$i" -le 250 ]; then 【此处为第十行，代码中无此括号内容】
i=$(($i+5))
else
i=$(($i+2))
fi
done
exit 0
#!/bin/sh
i=1
while [ "$i" -le 300 ]; do
ns w_w.tcl $i
gawk –f delay.awk rate=$i wired_wireless.tr >>delay
gawk –f loss.awk rate=$i wired_wireless.tr >>loss_rate
gawk -f throughtput.awk rate=$i wired_wireless.tr >>throughtput
if [ "$i" -le 225 ]; then
i=$(($i+20))
elif [ "$i" -le 250 ]; then 【此处为第十行，代码中无此括号内容】
i=$(($i+5))
else
i=$(($i+2))
fi
done
exit 0
