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…
Tag: DevOps
Liquibase: Index.exists exception fix
Task: Fix index exists precondition exception Solution: Instead of using index exists liquibase tag use sql to check index exists.…
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.
Git: How to compare two branches
Task: Compare two different git branches Solution: git diff branch1 branch2 Note: compare by specific file type git diff branch1…
Add php imap.so library on osX
Task: Add imap.so library on Mac osX Implementation (run commands in the console): Done.
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…
Add WAF to WP site
Task: add WAF service to WP site Implementation steps: Create WebACL Add rulesets:AWS-AWSManagedRulesCommonRuleSetAWS-AWSManagedRulesWordPressRuleSetAWS-AWSManagedRulesSQLiRuleSetAWS-AWSManagedRulesPHPRuleSetAWS-AWSManagedRulesKnownBadInputsRuleSet Disable next rules in the AWS-AWSManagedRulesCommonRuleSet:SizeRestrictions_BODYGenericRFI_BODYCrossSiteScripting_BODYGenericRFI_QUERYARGUMENTS Done.
Install WP CLI
Task: Install WP CLI tools Implementation: Download wp-cli.pharcurl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar Verify it:php wp-cli.phar –info Add executable attribute:chmod +x wp-cli.phar Move…
jMeter set num of threads and duration in CLI
Task: run test with different threads count and duration time Implementation: Set parameter value to “${__P(propName, defaultValue)}” in the test…
AWS BeansTalk add Nginx logrotate config
Task: Add configuration file with Nginx logrotate Implementation: Add file ./.ebextensions/logrotate.config Done.
How to clear CloudWatch client cache
Task: clear Cloud Watch client mon-put-instance-data.pl data Solution: Remove all files with subdirectories in the /var/tmp/aws-mon directory. Done.
Raspberry Pi Virtual keyboard
Task: Add Virtual (screen) keyboard on Raspberry Pi device Implementation: Install virtual keyboard application Add a Virtual Keyboard Toggle to…