objcopy:- copy and translate object files
objdump:- display information from object files.
od:- dump files in octal and other formats
oldfind:- search for files in a directory hierarchy (Ex:- oldfind /etc/)
on_ac_power:- test whether the computer is running on line power (Ex:- on_ac_power)
open:- open, creat - open and possibly create a file or device
openssl:- OpenSSL is a cryptography toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) network protocols and related cryptography standards required by them.
openvt:- start a program on a new virtual terminal (VT).
os-prober:- Discover bootable partitions on the local system.
ownership:- Compaq ownership tag retriever