chmod
Also called: change mode
Course: AP® Cybersecurity Shows up in: Unit 5: Securing Applications and Data
The Linux command that changes file permissions, using the numeric method (chmod 640 file) or the symbolic method (chmod g+w file).
Appears in the course and exam description (CED): 5.2.D.55.2.D.65.2.D.7
Why it matters in Unit 5
Read is 4, write 2, execute 1; the digits go owner, group, others.
Example
chmod 754 report.txt gives rwxr-xr--.