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sources/tech/20200107 Bash Script to Check How Long the High CPU-Memory Consumption Processes Runs on Linux.md
150 lines
5.7 KiB
Markdown
150 lines
5.7 KiB
Markdown
[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (Bash Script to Check How Long the High CPU/Memory Consumption Processes Runs on Linux)
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[#]: via: (https://www.2daygeek.com/bash-script-to-check-how-long-the-high-cpu-memory-consumption-processes-runs-on-linux/)
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[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
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Bash Script to Check How Long the High CPU/Memory Consumption Processes Runs on Linux
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======
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In the past, we have written three different articles to identify this using Linux commands.
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You can access them immediately by going to the relevant URLs below.
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* **[How to Find High CPU Consumption Processes in Linux][1]**
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* **[How to Find Out Top Memory Consuming Processes in Linux][2]**
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* **[Five Ways to Check How Long a Process Has Been Running in Linux][3]**
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Two scripts are included in this tutorial, which helps you to identify how long the high CPU/memory consumption processes are running on Linux.
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The script will show you the process ID, the owner of the process, the name of the process and how long the processes are running.
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This will help you identify which jobs are running overtime (which must be completed beforehand).
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This can be achieved using the ps command.
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### What’s ps Command
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ps stands for processes status, it display the information about the active/running processes on the system.
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It provides a snapshot of the current processes along with detailed information like username, user id, cpu usage, memory usage, process start date and time command name etc.
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### 1) Bash Script to Check How Long the High CPU Consumption Processes Runs on Linux
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This script will help you to identify how long the high CPU consumption processes has been running on Linux.
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```
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# vi /opt/scripts/long-running-cpu-proc.sh
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#!/bin/bash
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ps -eo pid,user,ppid,%mem,%cpu,cmd --sort=-%cpu | head | tail -n +2 | awk '{print $1}' > /tmp/long-running-processes.txt
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echo "--------------------------------------------------"
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echo "UName PID CMD Process_Running_Time"
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echo "--------------------------------------------------"
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for userid in `cat /tmp/long-running-processes.txt`
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do
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username=$(ps -u -p $userid | tail -1 | awk '{print $1}')
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pruntime=$(ps -p $userid -o etime | tail -1)
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ocmd=$(ps -p $userid | tail -1 | awk '{print $4}')
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echo "$username $userid $ocmd $pruntime"
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done | column -t
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echo "--------------------------------------------------"
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```
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Set an executable **[Linux file permission][4]** to **“long-running-cpu-proc.sh”** file.
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```
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# chmod +x /opt/scripts/long-running-cpu-proc.sh
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```
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When you run this script, you will get an output like the one below.
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```
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# sh /opt/scripts/long-running-cpu-proc.sh
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----------------------------------------------------
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UName PID CMD Process_Running_Time
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----------------------------------------------------
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daygeek 5214 Web 01:18:48
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daygeek 5748 Web 01:08:20
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daygeek 8043 inkscape 22:11
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daygeek 5269 Web 01:18:31
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daygeek 1712 Web 10:44:50
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daygeek 5335 RDD 01:17:54
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daygeek 1639 firefox 10:44:51
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daygeek 7793 nautilus 24:14
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daygeek 6301 Web 57:40
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----------------------------------------------------
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```
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### 2) Bash Script to Check How Long the High Memory Consumption Processes Runs on Linux
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This script will help you to identify how long the top memory consumption processes has been running on Linux.
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```
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# sh /opt/scripts/long-running-memory-proc.sh
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#!/bin/bash
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ps -eo pid,user,ppid,%mem,%cpu,cmd --sort=-%mem | head | tail -n +2 | awk '{print $1}' > /tmp/long-running-processes-1.txt
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echo "--------------------------------------------------"
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echo "UName PID CMD Process_Running_Time"
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echo "--------------------------------------------------"
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for userid in `cat /tmp/long-running-processes-1.txt`
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do
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username=$(ps -u -p $userid | tail -1 | awk '{print $1}')
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pruntime=$(ps -p $userid -o etime | tail -1)
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ocmd=$(ps -p $userid | tail -1 | awk '{print $4}')
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echo "$username $userid $ocmd $pruntime"
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done | column -t
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echo "--------------------------------------------------"
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```
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Set an executable Linux file permission to **“long-running-memory-proc.sh”** file.
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```
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# chmod +x /opt/scripts/long-running-memory-proc.sh
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```
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When you run this script, you will get an output like the one below.
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```
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# sh /opt/scripts/long-running-memory-proc.sh
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----------------------------------------------------
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UName PID CMD Process_Running_Time
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----------------------------------------------------
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daygeek 1639 firefox 10:44:56
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daygeek 2997 Web 10:39:54
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daygeek 5269 Web 01:18:37
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daygeek 1712 Web 10:44:55
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daygeek 8043 inkscape 22:17
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daygeek 5214 Web 01:18:54
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daygeek 1898 Web 10:44:48
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daygeek 1129 Xorg 10:45:07
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daygeek 6301 Web 57:45
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----------------------------------------------------
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```
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--------------------------------------------------------------------------------
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via: https://www.2daygeek.com/bash-script-to-check-how-long-the-high-cpu-memory-consumption-processes-runs-on-linux/
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作者：[Magesh Maruthamuthu][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.2daygeek.com/author/magesh/
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[b]: https://github.com/lujun9972
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[1]: https://www.2daygeek.com/how-to-find-high-cpu-consumption-processes-in-linux/
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[2]: https://www.2daygeek.com/linux-find-top-memory-consuming-processes/
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[3]: https://www.2daygeek.com/how-to-check-how-long-a-process-has-been-running-in-linux/
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[4]: https://www.2daygeek.com/understanding-linux-file-permissions/
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