POSIX or "Portable Operating System Interface" is the collective name of a family of related standards specified by the IEEE to define the application programming interface (API) for software compatible with variants of the Unix operating system.
ifconfig
network configuration information
netstat
cp <filename1> <filename2>
copy file, to current directory use dot notation, such as: cp reports/files* .
files *
show detail info about files in a direction
lp <filename>
print a file. Using the -d, changes the default printer, such as lp -d mp4 printcap.sample
ls
List files in a directory
more
show contents of a file. You can also pipe output from other commands such as ls through more, suchas ls | more
mv <filename1> <filename2>
move file
pr <filename>
print a file
rm <filename>
delete a file
man <topic>
help on commands; d for down, q for quit
cd
Change directories
pwd
current location
lpstat
view spooler. use lpstat -s to get available printers.
vi
i to insert text
:w to save or write text
:q to exit
wc
Count words or lines
grep
search utility. Example: grep -F 'SERVICE IN USE' g*