50 RHCSA exam questions and answers
The RHCSA (Red Hat Certified System Administrator) exam is a performance-based certification exam offered by Red Hat. It is designed…
Understanding Linux MAC Addresses: 10 Common Questions Answered
This article is part of the following series. Understanding MAC address in Linux In Linux, a MAC address (Media…
Search files by size in Linux
There are a few different ways to search files by size in Linux. One way is to use the find…
2 ways to fix could not load server certificate file ‘server.crt’: No such file or directory in PostgreSQL
The error “could not load server certificate file ‘server.crt’: No such file or directory” in PostgreSQL indicates that the server…
Enable SSL in Postgresql
Enabling SSL in PostgreSQL is a straightforward process that only requires three simple steps: Obtain server certificate and key…
2 ways to Preserve file permissions when copying files in Linux
Preserve file permissions using -p option in cp command To preserve the file permissions when copying files or directories using…
2 ways to fix cp Permission denied error
The error message “cp: Permission denied” typically occurs when the user doesn’t have permission to access the source file or…
3 ways to fix Did not find any relations in Postgresql
When running the \dt command in PostgreSQL, the error message “Did not find any relations” means that no tables were…
3 ways to get table size in Postgres
Get table size with pg_relation_size in Postgres PostgreSQL provides a dedicated function, pg_relation_size, to compute the actual disk space used…
2 ways to create file with Ansible
Create a file with Ansible file module There are a few ways to create a file with Ansible. One way…