From Ubuntu 24.04 to 26.04 and Reading Old Servers: sudo-rs, Rust Coreutils, nftables, SysV to systemd
On Ubuntu 26.04 the command names stay the same, but sudo-rs and the Rust coreutils can change behavior: in the uutils 0.10.0 I tested, ln -sfn is no longer atomic and sudo's error message differs, so run your scripts on the new release before upgrading. We cover OpenSSH 10's post-quantum key exchange, SysV scripts, the equivalents of ifconfig and iptables, RHEL differences and choosing between an in-place upgrade and a new server, with real output.
14 Nov 2026
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14 min
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3
