How to use cron with environment variables
· Linux
Pass environment variables and PATH settings to cron jobs so they run with the correct context.
Category: Linux
59 questions in Linux.
How to use netstat and ss for socket inspection
· Linux
Inspect network connections, listening ports, and socket statistics using netstat and the modern ss utility.
How to configure SSH key-based login
· Linux
Set up passwordless SSH authentication using public-private key pairs for secure remote access.
How to use systemd targets and runlevels
· Linux
Understand and switch between systemd targets to control which services start at boot.
How to schedule one-time tasks with at
· Linux
Run commands once at a specific time using the at command without editing crontab files.
How to use tail and head for log analysis
· Linux
View the beginning or end of files efficiently with tail and head, including real-time log monitoring.
How to secure file deletion with shred
· Linux
Overwrite files multiple times before deletion to prevent data recovery using the shred utility.
How to use openssl for certificates and encryption
· Linux
Generate keys, create certificate signing requests, and encrypt files using the OpenSSL command-line toolkit.
How to use sed for multi-line pattern replacement
· Linux
Perform advanced multi-line text transformations using sed with the N command and pattern spaces.
How to use tar gzip and zip for archiving
· Linux
Create and extract compressed archives on Linux using tar, gzip, and zip for backups and distribution.