Shell脚本中的top命令

我正在尝试通过Expect脚本获得top命令的前5行.我从外壳程序脚本中调用了这个期望脚本以及其他一些内容.

I am trying to get first 5 lines of top command through expect script. Im calling this expect script from a shell script along with some other stuff.

top | head -5给我下面的输出，即没有cpu统计信息-

top | head -5 gives me below output ie without cpu stats-

顶部-09:10:58最多46天，17:03、12个用户，平均负载:0.01、0.02， 0.00个任务:总共138个，正在运行1个，在睡眠137个，停止0个，僵尸0个

top - 09:10:58 up 46 days, 17:03, 12 users, load average: 0.01, 0.02, 0.00 Tasks: 138 total, 1 running, 137 sleeping, 0 stopped, 0 zombie

Mem:总计16432400k，使用的8408096k，免费的8024304k，609200k 缓冲区交换:总计6290736k，已使用0k，免费6290736k， 6754356k已缓存

Mem: 16432400k total, 8408096k used, 8024304k free, 609200k buffers Swap: 6290736k total, 0k used, 6290736k free, 6754356k cached

如果我仅在该远程服务器上运行top命令，我可以看到在更新CPU状态行之前有2-3秒的延迟，请问有人可以帮助我获得所有5条更新了CPU状态的行吗?以下是我的期望脚本-

If I run just top command on that remote server I can see there is a 2-3 second delay before the CPU states line is updated, can some one please help me to get all 5 lines with updated cpu states? Below is my expect script -

#!/usr/bin/expect -f
set user1 abc
set pass1 pass
set timeout 8
match_max 1000
spawn ssh -C -o stricthostkeychecking=no $user1@<ip>
expect "*?assword:*"
send  "$pass3\r"
expect "?xterm*"
send "\r"
send "top | head -5\r"
expect eof