Info Commands Line On Linux –Useful Help
The
following commands are useful for when you are trying to learn more about the
system or program you are working with in Linux. You might not need them every
day, but when you do, they will be invaluable.
 |
| Info Commands Line On Linux –Useful Help |
Free
The free
command displays the total amount of free and used
physical and swap memory in the system. For example, free
-m gives the information using megabytes.
DF
The df
command displays filesystem disk space usage for
all partitions. The command df-h is probably the most useful (the -h means human-readable).
Top
The top
program provides a dynamic realtime view of a
running system. It can display system summary information, as well as a list of
processes.
Unname-a
The uname
command with the -a option prints all system information, including machine name, kernel
name, version and a few other details.
PS
The ps
command allows you to view all the processes
running on the machine. Every operating system’s version of ps is slightly different
but all do the same thing.
GREP
The grep
command allows you to search inside a number of
files for a particular search pattern and then print matching lines. An example
would be: grep blah file.
SED
The sed
command opens a stream editor. A stream editor is
used to perform text transformations on an input stream: a file or input from a
pipeline.
Adduser
The adduser
command adds a new user to the system. Similarly,
the addgroup command adds a new group to the system.
Deluser
The deluser
command removes a user from the system. To remove
the user’s files and home directory, you need to add the –removehome
option.
Delgroup
The delgroup
command removes a group from the system. You
cannot remove a group that is the primary group of any users.
Man Man
The man
man command brings up the manual entry for the man
command, which is a great place to start when using it.
Man Intro
The man
intro command is especially useful. It displays the
Introduction to User Commands, which is a well written, fairly brief
introduction to the Linux command line.
0 Response to "Info Commands Line On Linux –Useful Help"
Post a Comment