a couple of questions about linux

robinhoodmp · 03-15-2009, 08:58 AM

Hello, I'm very new to this O.S. and need a couple questions answered please. 1. when I'm in the terminal, how can I get back my last command I entered? And 2. How do I get a list of all the C code files? Thanks for any and all help....R

Didier Spaier · 03-15-2009, 09:12 AM

Welcome to LQ.

1) Hit the "arrow up" key on your keyboard.
2) If we suppose that all C code files and only C code files end in ".c", issue following command in a terminal:

Code:

find / -name "*.c"

You will get a list of all files ending on .c that the user and/or associated group(s) under which you log in are allowed to see.

In the aforementioned command you can refine your search replacing / by the directory under which you search for files meeting the -name "*.c" predicate.

ccargo · 03-15-2009, 09:13 AM

Hi,

You can usually just use arrow-up and arrow-down to page through your previous commands.

I don't really understand the second question, what C-files?

Regards,

Cash

malekmustaq · 03-15-2009, 09:20 AM

Quote:

Originally Posted by robinhoodmp

Hello, I'm very new to this O.S. and need a couple questions answered please.

1. when I'm in the terminal, how can I get back my last command I entered? And

2. How do I get a list of all the C code files? Thanks for any and all help....R

(1)

==> Press Ctl+P
{this should return you to the immediate previous code you entered}

==> Press the UP arrow of the navigation keys
{this should sequentially bring you to previous commands}

(2)

/usr/src/linux/kernel
{here you'll have the source codes written in C}

/usr/include
{here are some C headers}

/go-take-a-survey/of_your_directories/get-familiar

Hope it helps.

Robhogg · 03-15-2009, 12:03 PM

You may not find many C source-code files on your system if you have just followed a standard install. Some may be available from the Fedora package manager (e.g., if I want the source code for my current kernel, I can download the linux-source-2.6.24 using Ubuntu's package manager). For sources for other parts of the system, you may have to go to the site of the project that developed it. For instance,

The GNU core utilities: http://directory.fsf.org/project/coreutils/
Gnome projects: http://projects.gnome.org/

If you haven't already found it, the file command is useful for identifying particular types of file. You could use it with grep filtering the output to identify all C files in a particular directory:

Code:

rob:src$ file * | grep 'C program text'
base64.c:        ASCII C program text
basename.c:      ASCII C program text
c99-to-c89.diff: ASCII C program text
...

The advantage of this (as the c99-to-c89.diff entry shows) is that it doesn't depend on the filename suffix.
Rob.

dcatiii · 07-15-2010, 10:30 AM

It seems you may have found your answer, but these methods may work as well...

1. Use the up arrow to view the previous command and press enter to execute it.
2. Type !! and press enter from the command line
3. Type !-1 and press enter from the command line.
4. Press Control+P will display the previous command, press enter to execute it

taken from http://www.thegeekstuff.com/2008/08/...-line-history/