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sysstat vs iotop-c: catalog facts
sysstat	iotop-c
Free Free and open source.	Free Free and open source.
Linux, Command line	Linux, Command line
Records historical activity data with sar for later review Covers CPU, disk, per-process and network statistics	Shows disk I/O per process rather than per device Familiar top-style terminal display
Linux only Text output with no graphical interface	Linux only Usually needs root privileges to see all processes
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.