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在 cron 中缩小顶部输出

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在 cron 中缩小顶部输出

我正在尝试通过 cron 发送电子邮件，以了解哪些进程占用了我的服务器。它工作正常，但生成的电子邮件太过狭窄，我需要了解有关该进程的更多信息。

这是我正在使用的脚本（从这里偷来的：http://www.inmotionhosting.com/support/website/server-usage/create-server-load-monitoring-bash-script)：

#!/bin/bash
trigger=10.00
load=`cat /proc/loadavg | awk '{print $1}'`
response=`echo | awk -v T=$trigger -v L=$load 'BEGIN{if ( L > T){ print "greater"}}'`

if [[ $response = "greater" ]]
then
top -cSbn 1 | head -14 | tail -8 | mail -s"High load on server - [ $load ]" [email protected]
fi

最终的电子邮件内容如下：

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND

 810809 root      20   0 20700  13m 3032 R   50  0.0   0:00.40 /prod/process-nam
 810802 root      20   0 20700  13m 3032 R   48  0.0   0:00.39 /prod/process-nam
 810808 root      20   0 20708  13m 3032 S   48  0.0   0:00.35 /prod/process-nam
 810803 root      20   0 20708  13m 3032 S   46  0.0   0:00.39 /prod/process-nam
 810810 root      20   0 20168  13m 3028 R   46  0.0   0:00.33 /prod/process-nam
 318723 www-data  20   0  146m 131m 3320 R   45  0.4  67:27.96 /home/server/pr
 810800 root      20   0 20704  13m 3032 S   45  0.0   0:00.39 /prod/process-nam

如您所见，缺少整个路径。但如果我从 bash 运行脚本，它就会起作用，并发送足够宽的电子邮件。

这是 ncurses 的问题吗？还是管道邮件的问题？

谢谢！

答案1

使用-w开关top。

   -w  :Output-width-override as:  -w [ number ]
        In  'Batch'  mode,  when  used without an argument top
        will format output using the COLUMNS= and LINES= envi‐
        ronment  variables,  if set.  Otherwise, width will be
        fixed at the maximum 512 columns.  With  an  argument,
        output width can be decreased or increased (up to 512)
        but the number of rows is considered unlimited.

        In normal display mode, when used without an  argument
        top  will  attempt to format output using the COLUMNS=
        and LINES= environment variables,  if  set.   With  an
        argument,  output  width  can  only  be decreased, not
        increased.  Whether using environment variables or  an
        argument with -w, when not in 'Batch' mode actual ter‐
        minal dimensions can never be exceeded.

        Note: Without the use  of  this  command-line  option,
        output  width is always based on the terminal at which
        top was invoked whether or not in 'Batch' mode.

答案2

谢谢 Sven，但我的 top 输出是这样的：

# top -w
top: unknown argument 'w'

我猜你有一个更新的版本。但你给我指明了正确的方向（+1）：我更改了脚本以导出列上的数字，现在我有了完整的输出：

#!/bin/bash

trigger=15.00

load=`cat /proc/loadavg | awk '{print $1}'`

response=`echo | awk -v T=$trigger -v L=$load 'BEGIN{if ( L > T){ print "greater"}}'`

if [[ $response = "greater" ]]
then
#sar -q | mail -s"High load on server - [ $load ]" [email protected]
export COLUMNS=512
top -cSbn 1 | head -14 | tail -14 | mail -s"High load on server YODA - [ $load ]" [email protected]
fi

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