Difference between cat , cat > , cat >> and touch !!! Post: 302199911

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

cat and loop

Hi I have a simple code that I want to execute. out=out.txt for f in `cat list.txt | head -1`; do echo $f >> $out echo "sleep 5" >> $out done cat list.txt | head -1 wget -q -O - 'http://test.com:15100/cgi-bin/search cat out.txt wget sleep 5 -q sleep 5 -O

2. Shell Programming and Scripting

for i in `cat myname.txt` && for y in `cat yourname.txt`

cat myname.txt John Doe I John Doe II John Doe III ----------------------------------------------------------------------- for i in `cat myname.txt` do echo This is my name: $i >> thi.is.my.name.txt done ----------------------------------------------------------------------- cat...

3. UNIX for Dummies Questions & Answers

'shutdown' and 'cat'

Hi All, This is actually a good interview question. On linux, the permissions and group for 'shutdown' and 'cat' is the same. -rwxr-xr-x 1 root root 18K 2008-05-21 10:43 shutdown -rwxr-xr-x 1 root root 17K 2007-01-30 19:51 cat Then why is it that a...

4. Shell Programming and Scripting

cat in the command line doesn't match cat in the script

Hello, So I sorted my file as I was supposed to: sort -n -r -k 2 -k 1 file1 | uniq > file2 and when I wrote > cat file2 in the command line, I got what I was expecting, but in the script itself ... sort -n -r -k 2 -k 1 averages | uniq > temp cat file2 It wrote a whole...

5. UNIX for Dummies Questions & Answers

for cat help

Hi there, I have the following problem. I have a csv file which looks like 'AGI,ABJ,Y,Y,Y,None,EQUATION,ANY,ANY,None,' 'AGI,ABJ,Y,Y,Y,None,EQUATION HEAVY,ANY,ANY,None,' 'AGI,ABJ,Y,Y,Y,None,VARIATION,ANY,ANY,None,' but I do this for ab in $(cat test.csv); do echo $ab; done in the...

6. Shell Programming and Scripting

Using cat and awk.......

Im trying to use cat and awk to calculate the total space, then display it using the print command. But something in my script is not correct? cat | awk '{print$1}' | sort -n | grep -v used | awk '{sum += $1} END { p rint sum;}' ??? Any help would be greatly appreciated!!

7. UNIX for Dummies Questions & Answers

Question regarding Cat

Can we concatenate say, I have a few files prefixing with 2009... So now i want all the 2009 files into one single file.. Can this be achieved????

8. UNIX for Advanced & Expert Users

Help need on cat command

I have two files as below 1.txt AA 123 CC 145 DD 567 2.txt AA 111 YY 128 CC 144 FF 222 DD 777 ZZ 875 basically 1.txt is updated file, if i do cat 1.txt 2.txt output should be as below o/p

9. UNIX for Dummies Questions & Answers

Cat with << >>

Hi, When I was analyzing the code I got below line. cat - << 'EOF' >> ${FILE PATH} I surfed net to understand but I couldn't get what is about. Please help me out.

LEARN ABOUT SUSE

post_menu

post(3MENU)															       post(3MENU)

NAME

       post - write or erase menus from associated subwindows

SYNOPSIS

       #include <menu.h>
       int post_menu(MENU *menu);
       int unpost_menu(MENU *menu);

DESCRIPTION

       The  function  post_menu  displays  a  menu to its associated subwindow.  To trigger physical display of the subwindow, use refresh or some
       equivalent curses routine (the implicit doupdate triggered by an curses input request will do). post_menu resets the  selection	status	of
       all items.

       The function unpost_menu erases menu from its associated subwindow.

RETURN VALUE

       These routines return one of the following:

       E_OK The routine succeeded.

       E_SYSTEM_ERROR
	    System error occurred (see errno).

       E_BAD_ARGUMENT
	    Routine detected an incorrect or out-of-range argument.

       E_POSTED
	    The menu has already been posted.

       E_BAD_STATE
	    Routine was called from an initialization or termination function.

       E_NO_ROOM
	    Menu is too large for its window. You should consider to use set_menu_format() to solve the problem.

       E_NOT_POSTED
	    The menu has not been posted.

       E_NOT_CONNECTED
	    No items are connected to the menu.

SEE ALSO

       ncurses(3NCURSES), menu(3MENU).

NOTES

       The header file <menu.h> automatically includes the header file <curses.h>.

PORTABILITY

       These routines emulate the System V menu library.  They were not supported on Version 7 or BSD versions.

AUTHORS

       Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S. Raymond.

																       post(3MENU)