I have the following line in a script that searches files in several directories and shows the search results on the screen.
ls "$path" | xargs cat | tr -s " " | fgrep -i "$search_arg"
But, because I'm also using CAT and TR, the output from the search does not display the name of the file... (6 Replies)
Hello,
I have over 200 files and some of them have the string like "John price $200". I would like to grep the string. Then output the filename which found the string.
I have the following script, but it ONLY output the string
echo Please input list file name:
read listn
for file in `cat... (3 Replies)
Hi all,
I am trying to zgrep / grep list of files so that it displays only the matching filename:line number and does not display the whole line, like:
(echo "1.txt";echo "2.txt") | xargs zgrep -no STRING
If I use -o option, it displays the matching STRING and if not used, displays the... (3 Replies)
i want to redirect the grep output into the variable
but i am not able to get it
i tried
veri=`grep -i $1 "${logdir}"* | grep -i adding | grep -iv equation | tail -1 | cut -d ':' -f 1`
vari=$(grep -i $1 "${logdir}"* | grep -i adding | grep -iv equation | tail -1 | cut -d ':' -f 1)
BUT NOT... (1 Reply)
Hi,
I am writing the following code in command prompt it is working fine.
grep ',222,' SAPPCO_20080306.CSV_old > SAPPCO_20080306.CSV_new
But the command is not working in the Shell Script...
##########################################
#!/bin/sh
#... (2 Replies)
hi,
i wat to get the output of a grep command in a file. but when i am trying out the same grep command in the unix prompt its working fine.. i am getting the output properly.. but when i am writing the same command inside my shell script , its just creating a new output file with no contents... (11 Replies)
Hi,
I have to rename all occurance of CUST_MST to RESELLER_MST both in filename and file content under a directory (say D0) which contains multiple (2-3 levels) sub directory.
Example:
D0 -> D1 -> D2 has a file CUST_MST_TEMP.txt
this contains :
> cat /D0/D1/D2/CUST_MST_TEMP.txt... (3 Replies)
Hi Everyone,
Can anyone please tell me, how can I redirect the grep command output to same file. I am trying with below command but my original file contains no data after executing the command.
$grep pattern file1 > file1
Kind Regards,
Eswar (5 Replies)
Hi,
I have multiple directories built in following manner
/app/red/tmp
/app/blue/upd
/app/blue/tmp
/app/green/tmp
/app/red/upd
/app/green/upd
I have filenames having pattern ONE.XXX.dat TWO.ZZZ.dat and so on across the folders listed above
My objective is to list all filenames of a... (4 Replies)
i have simple program that generate log file 1 line every sec, i need to do grep for specific record then redirect to another file.
#!/bin/bash
for i in `seq 1 20`;
do
echo $i
sleep 1
done
./test.sh |egrep "5|10|15"
5
10
15
r
./test.sh... (2 Replies)
Discussion started by: before4
2 Replies
LEARN ABOUT LINUX
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)