I repeat: the printable contents of the file input.txt is:
There are no lines in this file that will not be deleted from the output by the sed command because every line in the input file contains an "8"!
hey,
I use cygwin to connect to AIX 5.2 but when I open vi I get an error saying:
ex: 0602-108 cygwin is not a recognized terminal type
how can I fix that? I thought cygwin was tty vt100? (1 Reply)
Hello All,
I am facing a problem on SCO Open Server V 5x, We are using serial communication on dumb terminals, right now i am facing a problem on some terminals, as they are not showing thier previous tty no, as tty13 or tty18, but they are showing ttya6 or ttya4, i also tried to move and link... (5 Replies)
i am executiing some commands using system an popen command in c.
while executing the code .
some data is shown on terimal without using any print statement.
how can i solve this problem
thank u
sree (1 Reply)
I'm hoping someone can help me out here.
I'm having a problem on my Red Hat Enterprise 5 Server where my tty devices "tty" are being set to read only permissions.
I need them to be set to 777 in order to write to the serial printers through a custome application.
I have gone through many... (2 Replies)
Hello everyone. This is my first post.:o
Using Ubuntu 8.04 and bash 3.2.39 i'm trying to adapt my routine to this platform.
So, this means forget xterm and use gnome-terminal (as default ubuntu terminal). EveryDay i need to connect to several servers, and i've made a Tcl'script to make this... (1 Reply)
I've a python script named rwe.py. I'm running the program in three separate terminals. If one of the executing program stops . I want to leave the terminal as it is so that i can see the error. i wrote a the below script and used cron to run it every one hour to check if the three programs are... (0 Replies)
Im a complete newbie tryin to work with linux centos;
in terminal wanted to log with script command;
but output file has some strange characters when I try to open with gedit or bluefish
terminal , gedit, bluefish encoding is utf-8 ;
Script started on Mon 08 Mar 2010 03:32:39 PM EET... (2 Replies)
Hi Guys,
I'm using my putty to connect to the HP-UX test box. Once I get connected to server there seem to be something wrong with my putty that behaves very odd. for example it starts from the half of the screen. I really dont know how to explain this problem. or for instance when i run vi to... (2 Replies)
I am trying to delete all empty lines from a file using either
grep -v ^$ file
or
sed '/^$/d' file
But neither one is working.
I have uploaded the file I am trying to modify. Any help will be greatly apreciated. (3 Replies)
Discussion started by: Xterra
3 Replies
LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)