What do you want to insert?
I want to insert the first argument, which will be a line of text
Where do you want to insert it?
In the middle of the second argument which is a text file
I assume that you do not want it in the middle of the second argument, but in the middle of the file pointed to by the second argument.
If that is the case, you need to find out how many lines are in the file, use head to read that number of lines; insert the text; use tail to get the rest of the file, or use awk.
Hi,,,
is there any possibility to install Linux in my P.C which is use Win98 without loose anything from my hard disk????
----------------------------------------------------------------------------------
Is it better for a newbie in this kind of OS to install Linux instead of... (5 Replies)
hi! how when i'm chattin inside com there was this chatter andi don't know what he did but he saw all my files inside my shell. what did he do? (4 Replies)
A red hat linux ftp server exists in which a file exists. My problem is I need to connect to this server from my windows xp terminal which is in the same network & retrieve the file then convert it to xcel for some data
Pls advs commands and procedure to connect to the machine...oh my god... (1 Reply)
Hello experts,
I have this complicated code that output value in between pattern and add "a string" to the front of the output.
The problems I have many pattern that are the same.
so I want to know how to get the value between 1st pattern, 2nd pattern etc.
Any suggestions?
sed -n... (14 Replies)
I am confused c#t#d#s# once I learn the following :
slice 0 ...... 0 to 2520
slice 1....... 2521 to 2840
slice 6........2841 to 8891
slice 2........0 to 8891
really really confused. Please explain. (8 Replies)
Hello,
I am having a problem with Dual Booting Windows XP Pro and Linux Mint.
I have Three Hard Drives,
One Hard Drive has Linux Mint Loaded on it. When it is hooked up to the computer by itself it works great. This is an IDE Drive.
The Second Hard Drive has Window XP Pro loaded on it.... (3 Replies)
Hi All,
I'm pretty new to this so please bear with me...
I'm trying to write a bash script to first search in a file for a string of characters; if the characters exist than skip the rest of the code until you get to the last line and run that command /sbdin/ldconfig; if the string doesn't... (2 Replies)
Discussion started by: gmdune
2 Replies
LEARN ABOUT CENTOS
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)