Difference between revisions of "Introduction to Linux in HPC/Processes"
Introduction to Linux in HPC/Processes
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=== Exercises in Terminal === <!--T:5--> | === Exercises in Terminal === <!--T:5--> | ||
| − | 1 | + | 1. Start a process, bring it into background/foreground. |
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{| role="presentation" class="wikitable mw-collapsible mw-collapsed" | {| role="presentation" class="wikitable mw-collapsible mw-collapsed" | ||
| <strong>Hint:</strong> | | <strong>Hint:</strong> | ||
| Line 72: | Line 59: | ||
|} | |} | ||
| − | + | 2. Start the task manager and identify the process with the largest memory usage. | |
{| role="presentation" class="wikitable mw-collapsible mw-collapsed" | {| role="presentation" class="wikitable mw-collapsible mw-collapsed" | ||
| <strong>Hint:</strong> | | <strong>Hint:</strong> | ||
|- | |- | ||
| | | | ||
| − | Start the | + | Start the process manager: top |
Activate highlighting for current sort column: press 'x' | Activate highlighting for current sort column: press 'x' | ||
Select column to sort for: press '>' or '<' until column '%MEM' is acitve | Select column to sort for: press '>' or '<' until column '%MEM' is acitve | ||
(optional) Reverse sorting: press 'R' | (optional) Reverse sorting: press 'R' | ||
| + | |} | ||
| + | |||
| + | 3. Start the task manager and filter processes of your user account. | ||
| + | {| role="presentation" class="wikitable mw-collapsible mw-collapsed" | ||
| + | | <strong>Hint:</strong> | ||
| + | |- | ||
| + | | | ||
| + | Start the process manager: top | ||
| + | Select username to filter: press 'u' and type in username | ||
| + | |} | ||
| + | |||
| + | 4. Start a process (e.g. sleep 10m) and kill it from a second console. | ||
| + | {| role="presentation" class="wikitable mw-collapsible mw-collapsed" | ||
| + | | <strong>Answer:</strong> | ||
| + | |- | ||
| + | | | ||
| + | Start the process: sleep 10m | ||
| + | Go to a second console. | ||
| + | Start the process manager: top | ||
| + | Filter process from your user account: press 'u' and type in your account name. | ||
| + | Identify the job ('sleep') and note the associated PID. | ||
| + | Kill it: press 'k' and type in the PID from previous step. | ||
|} | |} | ||
Revision as of 17:15, 30 November 2020
| Tutorial | |
|---|---|
| Title: | Introduction to Linux in HPC |
| Provider: | HPC.NRW
|
| Contact: | tutorials@hpc.nrw |
| Type: | Multi-part video |
| Topic Area: | HPC Platforms |
| License: | CC-BY-SA |
| Syllabus
| |
| 1. Background and History | |
| 2. The Command Line | |
| 3. Linux Directory Structure | |
| 4. Files | |
| 5. Text display and search | |
| 6. Users and permissions | |
| 7. Processes | |
| 8. The vim text editor | |
| 9. Shell scripting | |
| 10. Environment variables | |
| 11. System configuration | |
| 12. SSH Connections | |
| 13. SSH: Graphics and File Transfer | |
| 14. Various tips | |
Video
Quiz
What does PID stand for?
How are the permissions of a process set?
Exercises in Terminal
1. Start a process, bring it into background/foreground.
| Hint: |
To bring a process to background:
Press Ctrl-Z (pause the process).
Type bg (bring it to background).
To bring a process to foreground:
Display running "jobs" and identify the job ID: jobs
Type fg <job-ID> (bring it to foreground).
|
2. Start the task manager and identify the process with the largest memory usage.
| Hint: |
Start the process manager: top
Activate highlighting for current sort column: press 'x'
Select column to sort for: press '>' or '<' until column '%MEM' is acitve
(optional) Reverse sorting: press 'R'
|
3. Start the task manager and filter processes of your user account.
| Hint: |
Start the process manager: top
Select username to filter: press 'u' and type in username
|
4. Start a process (e.g. sleep 10m) and kill it from a second console.
| Answer: |
Start the process: sleep 10m
Go to a second console.
Start the process manager: top
Filter process from your user account: press 'u' and type in your account name.
Identify the job ('sleep') and note the associated PID.
Kill it: press 'k' and type in the PID from previous step.
|