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Every post filed under “linux”, newest first.
4 posts.
Pushkar Kumar 8 min read
The chown command in Linux explained: user:group syntax, chown -R and symlinks, --reference, chgrp, chmod vs chown, and fixing Docker volume permission errors with numeric IDs.
Pushkar Kumar 10 min read
The chmod command in Linux explained: octal and symbolic modes, chmod +x, chmod -R and its traps, setuid, setgid and sticky bits, umask, and how to fix Permission denied.
Pushkar Kumar 6 min read
An IPv6 subnet calculator explained: why classic ipcalc is IPv4-only, how sipcalc adds IPv6 support, and the exact math behind splitting a /48 into /64s.
Pushkar Kumar 7 min read
Converting crontab entries into systemd .timer and .service units — OnCalendar syntax, logging, randomized delays, catch-up runs and the migration gotchas.