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ScAlAn

Scientific Algorithms and Analytics

Tag: linux

Raspberry Pi Set custom display resolution

Task: Set custom screen size and use it on small monitor Solution: Use next commands: Done.
Continue reading “Raspberry Pi Set custom display resolution”…
Posted on: March 22, 2023 Last updated on: March 22, 2023 Comments: 0 Written by: Alex

How to Set all directories to 755 and all files to 644

Task: set different attributes for files and directories Solution: Done.
Continue reading “How to Set all directories to 755 and all files to 644”…
Posted on: June 29, 2022 Last updated on: June 29, 2022 Comments: 0 Written by: Alex

Monitor periodically linux ordered processes

Task: Monitor processes on the linux instance order by CPU usage Solution Use next command (displays top 15 rows): ps…
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Posted on: November 24, 2021 Last updated on: November 24, 2021 Comments: 0 Written by: Alex

Linux check if server exists by IP and port

Task: Check if server exists by IP and port in the Jenkins Job before connect to it by SSH in…
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Posted on: November 2, 2021 Last updated on: November 2, 2021 Comments: 0 Written by: Alex

AWS get list of ec2 ids by beanstalk environment name

Task: Get list of EC2 instances Id(s) by beanstalk environment name Solution: envname=”wp-env” for ec2Id in $(aws elasticbeanstalk describe-environment-resources –environment-name…
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Posted on: October 29, 2021 Last updated on: October 29, 2021 Comments: 0 Written by: Alex

Linux: /dev/ttyUSB0: Permission denied

Problem: Can’t connect to the Arduino device. Solution: Run next command(s) under root user: usermod -a -G dialout scalan usermod…
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Posted on: September 21, 2021 Last updated on: September 21, 2021 Comments: 0 Written by: Alex

Docker: How to copy file from container to local computer

Task: Copy some file from container to local computer Solution: docker cp <container>:<path><filename.ext> <localpath> Example: docker cp nginx:/var/log/mylog.log . Done.
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Posted on: September 1, 2021 Last updated on: September 1, 2021 Comments: 0 Written by: Alex

Install MariaDB on Ubuntu

Task: Install mariaDB server on Ubuntu Implementation: Update packages:sudo apt updatesudo apt upgrade Install MariaDB server package:sudo apt install mariadb-server…
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Posted on: May 10, 2021 Last updated on: April 27, 2021 Comments: 0 Written by: Alex

Raspberry Pi Virtual keyboard

Task: Add Virtual (screen) keyboard on Raspberry Pi device Implementation: Install virtual keyboard application Add a Virtual Keyboard Toggle to…
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Posted on: February 24, 2021 Last updated on: February 24, 2021 Comments: 0 Written by: Alex

Fix upgrade Jenkins on Ubuntu

While I am updating Jenkins server – see: How to fix: Output: Try to upgrade: Done.
Continue reading “Fix upgrade Jenkins on Ubuntu”…
Posted on: January 25, 2021 Last updated on: February 25, 2021 Comments: 0 Written by: Alex

Howto get list of directories and their size in Linux

Task: Get lust of directories and their size Solution: du -sh * With hidden directories: sudo du -sh $(ls -A)…
Continue reading “Howto get list of directories and their size in Linux”…
Posted on: December 19, 2020 Last updated on: December 23, 2020 Comments: 0 Written by: Alex

Howto wait beanstalk environment to be ready

Task: Implement loop to wait till AWS BeansTalk environment will be ready Implementation: #!/bin/bash echo ‘Waiting…’ status=” iterations=0 maxiterations=20 while…
Continue reading “Howto wait beanstalk environment to be ready”…
Posted on: December 19, 2020 Last updated on: December 23, 2020 Comments: 0 Written by: Alex
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