Sponsored Content
Full Discussion: Fighting useless use of cat
The Lounge What is on Your Mind? Fighting useless use of cat Post 302781741 by Corona688 on Sunday 17th of March 2013 03:41:42 PM
Old 03-17-2013
It's done like this:

Code:
while read lone
do
...
done < inputfile

Blindly editing code with sed is an even more dangerous idea than UUOC.
 

5 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

useless command

Hi, I came across with this line "set -x" in the beginning of a script, but i can't find one logic reason for this... should be something else after, i think.... anyone can help? tanx (2 Replies)
Discussion started by: cabresto
2 Replies

2. UNIX for Dummies Questions & Answers

Difference between cat , cat > , cat >> and touch !!!

Hi Can anybody tell the difference between Difference between cat , cat > , cat >> and touch command in UNIX? Thanks (6 Replies)
Discussion started by: skyineyes
6 Replies

3. 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... (21 Replies)
Discussion started by: shira
21 Replies

4. Shell Programming and Scripting

Useless Cat usage

cat ~/text.xt | while read line do echo ${line} | perl -pe 's/(\d+)/localtime($1)/e' done how can i efficiently re-code the above? also, no matter how i run this, i'm not getting the current/correct date. the contents of the "text.xt" looks like this: SERVICES... (2 Replies)
Discussion started by: SkySmart
2 Replies

5. What is on Your Mind?

Quest for the most useless command

I wrote by accident: cd . and even hit ENTER. Then I realized this is probably the most useless command that you can imagine. Yes, perhaps it could assert that there is still a working filesystem, but I am not sure about it. What do you think? Can you think of any more useless commands? :) (6 Replies)
Discussion started by: colemar
6 Replies
HEXCURSE(1)						      General Commands Manual						       HEXCURSE(1)

NAME
hexcurse - an ncurses-based hex editor SYNOPSIS
hexcurse [ -? | -help ] [ -a ] [ -r rnum ] [ -o outputfile ] [ [ -i ] inputfile ] DESCRIPTION
hexcurse is an ncurses-based hexeditor utility that is able to open, modify, and save a file to disk while providing useful editing and searching options. OPTIONS
-? | -help Prints out the command usage info -a Specifies the addresses to be output in decimal format initially. -r rnum Specifies the number of characters per line that the hexeditor should output. If rnum is either less than 1 or greater than the columns of the current terminal, hexcurse will fill the terminal width, just as if the -r was not specified. -o outputfile Specifies the output file to be written to by default. [-i] inputfile Specifies the input file to be read in. -i is not needed if inputfile is the last argument on the line. INTERACTIVE OPTIONS
F1 | ctrl+? Shows key command help. F2 | ctrl+s Save the current file. F3 | ctrl+o Opens a file. F4 | ctrl+g Goto a certain location in the current file. Depending on which way the addresses are being viewed at the moment, the search will behave differently. If the addresses are currently in hex format, the search will search as if the input was given in hexadecimal format. If the addresses are in decimal format, the function will search for the address in decimal. F5 | ctrl+f Search for a certain string in the current file. Depending on which window the user is currently editing in, this search will behave differently. If editing in the hex window, the input should only be in hexadecimal, and it will search for the hexadecimal "string." If the current editing window is the ASCII window, the input should be ASCII characters, and the search will find that ASCII string in the file. F6 | ctrl+a Switch between hexadecimal address values and decimal address values. F7 | TAB Switch between the hexadecimal and ASCII editing windows. F8 | ctrl+q | ctrl+x Exit out of the program. Page Up | ctrl+u Scroll one 'page' up. Page Down | ctrl+d Scroll one 'page' down. Home | ctrl+t Returns to the top of the file. End | ctrl+b Jumps to the bottom of the file. ctrl+z Undo the last modification. Can be used multiple times. Esc Escapes out of the save, open, goto, and find prompts. SEE ALSO
hexdump(1) , ncurses(3) AUTHORS
The authors of hexcurse are: jewfish <jewfish@jewfish.net> armoth <uknowho@jewfish.net> The current version of this software is always availabe at http://www.jewfish.net/software.php BUGS
On some terminals the function keys will not work. Support for resizable terminals is still a bit rudimentary. At this time, when the terminal is resized, the cursor is positioned at the beginning of the file. This will be corrected in the next release. There is also an issue where the labels on the bottom of the screen do not resize correctly. A fix for the latter is in the works. To report a bug or problem, please e-mail: devel@jewfish.net TODO
When we get the time, we would like to implement the ability to insert and delete data from the file. Please e-mail us with any additional suggestions. 22 December 2003 HEXCURSE(1)
All times are GMT -4. The time now is 01:57 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy