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从命令输出中删除行

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从命令输出中删除行

我正在以下命令运行；我需要将命令的输出存储在文件中，但没有标题。

我尝试过 - yarn top | tail -n +8（就像yarn topLinux 一样，top它每 3 秒刷新一次并重复输出）

yarn top
YARN top - 00:47:26, up 24d, 2:49, 0 active users, queue(s): root
NodeManager(s): 7 total, 7 active, 0 unhealthy, 0 decommissioned, 0 lost, 0 rebooted
Queue(s) Applications: 8 running, 111 submitted, 15 pending, 111 completed, 5 killed, 5 failed
Queue(s) Mem(GB): 100 available, 20 allocated, 0 pending, 0 reserved
Queue(s) VCores: 200 available, 2 allocated, 0 pending, 0 reserved

                  APPLICATIONID USER             TYPE      QUEUE   #CONT  #RCONT  VCORES RVCORES     MEM    RMEM  VCORESECS    MEMSECS %PROGR       TIME NAME
application_1484661449412_1115434 papp     mapreduce    default       3       0       3       0     16G      0G         28        172   5.00   00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp     mapreduce    default       2       0       2       0     12G      0G         86        545  95.00   00:00:00 oozie:launch
application_1484661449412_1115433 eapp     mapreduce       eapp       2       0       2       0     12G      0G         23        160   5.00   00:00:00 oozie:launch
application_1484661449412_1115386 eapp     mapreduce       eapp       2       0       2       0     12G      0G        250       1524  95.00   00:00:02 oozie:launch

预期产出

application_1484661449412_1115434 papp     mapreduce    default       3       0       3       0     16G      0G         28        172   5.00   00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp     mapreduce    default       2       0       2       0     12G      0G         86        545  95.00   00:00:00 oozie:launch
application_1484661449412_1115433 eapp     mapreduce       eapp       2       0       2       0     12G      0G         23        160   5.00   00:00:00 oozie:launch
application_1484661449412_1115386 eapp     mapreduce       eapp       2       0       2       0     12G      0G        250       1524  95.00   00:00:02 oozie:launch

答案1

在这种情况下使用 grep 效果最好：

1) yarn top | grep -A20 APPLICATIONID

A - 匹配字符串后打印数据

20- (A) 匹配字符串后要打印的行数

[gc13@oc1245342277 sh]$ cat text1 
YARN top - 00:47:26, up 24d, 2:49, 0 active users, queue(s): root
NodeManager(s): 7 total, 7 active, 0 unhealthy, 0 decommissioned, 0 lost, 0 rebooted
Queue(s) Applications: 8 running, 111 submitted, 15 pending, 111 completed, 5 killed, 5 failed
Queue(s) Mem(GB): 100 available, 20 allocated, 0 pending, 0 reserved
Queue(s) VCores: 200 available, 2 allocated, 0 pending, 0 reserved

                  APPLICATIONID USER             TYPE      QUEUE   #CONT  #RCONT  VCORES RVCORES     MEM    RMEM  VCORESECS    MEMSECS %PROGR       TIME NAME
application_1484661449412_1115434 papp     mapreduce    default       3       0       3       0     16G      0G         28        172   5.00   00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp     mapreduce    default       2       0       2       0     12G      0G         86        545  95.00   00:00:00 oozie:launch
application_1484661449412_1115433 eapp     mapreduce       eapp       2       0       2       0     12G      0G         23        160   5.00   00:00:00 oozie:launch
application_1484661449412_1115386 eapp     mapreduce       eapp       2       0       2       0     12G      0G        250       1524  95.00   00:00:02 oozie:launch
[gc13@oc1245342277 sh]$ 
[gc13@oc1245342277 sh]$ 
[gc13@oc1245342277 sh]$ 
[gc13@oc1245342277 sh]$ 
[gc13@oc1245342277 sh]$ cat text1 | grep -A20 APPLICATIONID
                  APPLICATIONID USER             TYPE      QUEUE   #CONT  #RCONT  VCORES RVCORES     MEM    RMEM  VCORESECS    MEMSECS %PROGR       TIME NAME
application_1484661449412_1115434 papp     mapreduce    default       3       0       3       0     16G      0G         28        172   5.00   00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp     mapreduce    default       2       0       2       0     12G      0G         86        545  95.00   00:00:00 oozie:launch
application_1484661449412_1115433 eapp     mapreduce       eapp       2       0       2       0     12G      0G         23        160   5.00   00:00:00 oozie:launch
application_1484661449412_1115386 eapp     mapreduce       eapp       2       0       2       0     12G      0G        250       1524  95.00   00:00:02 oozie:launch
[gc13@oc1245342277 sh]$

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