Hi,
I have some question and need some guidance how to sort and match multiple files.
1. all the data in the files are numbers
e.g. 1234567
1584752
2563156
2. each sorted file have their own ouput. e.g. test.csv -> test_sorted.csv
3. Then, I need to match all... (4 Replies)
Hi there,
I need help.
I want to run the command:
less filename | wc -l
But on multiple files in a directory
So to get those files I would run
ls -ltr | grep filename_2000123 or of course ls -ltr *filename_2000123*
But I am having a problem running a loop to get a count of each... (1 Reply)
I have a number of simulation log files and I want to get a total count of the "PASSED" expression in them. If I use grep -c <files>, grep would give a tally for each file. I just want one number, the total count. How do I do that? (4 Replies)
Hey all,
I'm looking for a command that will search a directory (and all subdirectories) and give me a file count for the number of files that contain specific characters within its filename. e.g. I want to find the number of files that contain "-a.jpg" in their name.
All the searching I've... (6 Replies)
Hey everyone,
I've to count lines from string of files names then to show sum output of lines.
for example:
read x = F1 F2 F3
F1 = 12 lines
F2 = 14 lines
F3 = 10 lines
= 36
what I did is:
read x
echo $x >|temp
for x in $(cat temp)
do
wc -l < $x (3 Replies)
I have some text files as shown below. I would like to add the values of each string. Your help would be appreciated!!
file1.txt
SUS 2
PRS 2
ALI 1
PRS 1
GLK 2
file2.txt
PRS 3
GLK 6
SUS 18
Desired output
SUS 20
PRS 6 (2 Replies)
Hi All,
Everyday we will receive 33 files in our source directory(/prd/pk) with the current date. Once our jobs are completed all the 33 files immediately will be moved to backup folder (/prd/pk/backup).
Now, I need to check between source file directory (/prd/pdk) and backup file directory... (3 Replies)
Looking for a little help here.
I have 1000's of text files within a multiple folders.
YYYY/
/MM
/1000's Files
Eg.
2014/01/1000 files
2014/02/1237 files
2014/03/1400 files
There are folders for each year and each month, and within each monthly folder there are... (4 Replies)
Hi I have a problem, I have a large group of archive files in a folder some are later versions of the same archive, the only difference btween them is that the archiving program we use appends the name with a code for it to keep track of in its data base, and the modification date.
I am starting... (6 Replies)
Discussion started by: Paul Walker
6 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)