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Accepted
Anthony Fornito
Asked: 2018-09-26 07:54:49 +0800 CST

停止在后台显示命令的输出

  • 772

我有一个 1 班轮，它将 telnet 会话的输出写入文件。

while sleep 5; do sleep 1 | telnet 11.22.33.44 443 | tee -a /var/tmp/test$(date +%Y%m%d).txt && date >> /var/tmp/test$(date +%Y%m%d).txt; done &

我不想看到第一个命令的输出但是想运行这个 1 班轮并显示输出：

awk '!/Trying/{count++}/Trying/{if (count == 4) print "Connected"; else if (count == !NR) print ""; else print "Failed"; count = 0}' test$(date +%Y%m%d).txt

奖金如果！可以在 1 行中同时显示输出，如下所示：

while sleep 5; do sleep 1 | telnet 159.203.162.223 443 | tee -a /var/tmp/test$(date +%Y%m%d).txt && date >> /var/tmp/test$(date +%Y%m%d).txt; done & awk '!/Trying/{count++}/Trying/{if (count == 4) print "Connected"; else if (count == !NR) print ""; else print "Failed"; count = 0}' test$(date +%Y%m%d).txt
Connected
Connected
Connected
Connected
Connected
Connected
Connected
Connected
Connected
Connected
centos

1 个回答

  1. Best Answer

    如果可能，您可能需要考虑使用netcat( nc) 而不是尝试解析telnet输出。例如：

    $ while sleep 5; do nc -C 93.184.216.34 443 </dev/null && echo "Connected" | tee -a /var/tmp/test$(date +%Y%m%d).txt && date >> /var/tmp/test$(date +%Y%m%d).txt; done
Connected
Connected
Connected
Connected
^C

    --

    $ cat /var/tmp/test20180925.txt
Connected
Tue Sep 25 16:42:57 UTC 2018
Connected
Tue Sep 25 16:43:02 UTC 2018
Connected
Tue Sep 25 16:43:07 UTC 2018
Connected
Tue Sep 25 16:43:12 UTC 2018

    试试这个更接近你正在寻找的东西

    while sleep 5; do sleep 1 | nc -v 159.203.162.223 443 2>&1; echo $(date) >> /var/tmp/test$(date +%Y%m%d).txt; done >> /var/tmp/test$(date +%Y%m%d).txt & tail -f /var/tmp/test$(date +%Y%m%d).txt | grep 'Connected\|timed\|refused'
    • 1

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