Software Usage Function
expr expr EXPRESSION evaluate expressions
file file [-bchikLNnprsvz0] [--apple] [--mime-encoding] [--mime-type] [-e testname] [-F separator] [-f namefile] [-m magicfiles] file ... determine file type
mount mount [-lhV] mount a filesystem
sudo sudo -l [-AknS] [-a type] [-g group] [-h host] [-p prompt] [-U user] [-u user] [command] execute a command as another user
who who [OPTION]... [ FILE | ARG1 ARG2 ] show who is logged on
gawk gawk [ POSIX or GNU style options ] -f program-file [ -- ] file ... pattern scanning and processing language
wall wall [-n] [ message ] Write a message to all users
sort sort [OPTION]... [FILE]... sort lines of text files
wc wc [OPTION]... [FILE]... print newline, word, and byte counts for each file
info info [OPTION]... [MENU-ITEM...] read Info documents
ps ps [options] report a snapshot of the current processes.
sed sed [OPTION]... {script-only-if-no-other-script} [input-file]... stream editor for filtering and transforming text
mkdir mkdir [OPTION]... DIRECTORY... make directories
printf printf FORMAT [ARGUMENT]... format and print data
bc bc [ -hlwsqv ] [long-options] [ file ... ] An arbitrary precision calculator language
cmp cmp [OPTION]... FILE1 [FILE2 [SKIP1 [SKIP2]]] compare two files byte by byte
at at [ -rd ] job [job...] queue, examine or delete jobs for later execu-tion
vim ex Vi IMproved, a programmers text editor
which which [options] [--] programname [...] shows the full path of (shell) commands.
ln ln [OPTION]... TARGET... DIRECTORY make links between files