O'Reilly logo
  • nthesis bv thinks this is interesting:

sort -k3 -t : /etc/passwd, for instance, which uses the field separator : to sort the third column of the /etc/passwd file.

From

Cover of Red Hat RHCSA/RHCE 7 Cert Guide: Red Hat Enterprise Linux 7 (EX200 and EX300)

Note

should be : sort -k3n,3 -t : /etc/passwd