This doesn't seem to work as expected, it is removing the dated file 2016.log in this case after giving message "input file is output file'whereas I'm looking to append to it. I'm trying to figure out how to append to multiple dated log files for eg...all aaa.log files should append to one aaa.2016.log, bbb.log files in bbb.2016.log file and so on.
---------- Post updated at 11:30 PM ---------- Previous update was at 06:42 PM ----------
This is what I came up with and wondering if this could be made simpler or enhanced further, pls advise.
Hi,
After checking all the UNIX threads, I am able to come up with a solution so far. I am working on a shell script where it moves the files to a certain directory. The conditions to check are
1) Check if the file exists in the current directory.
2) Check if the destination directory... (2 Replies)
Hello!!!!!!!!
I have an issue regarding inserting records in a file columnwise.Is it possible using awk/nawk script?
Example:
File1:
1|AAA|25|2
5|qqe|20|7
4|wer|31|81
I need to create a second file in which data can be inserted in a columnwise manner i.e.
File2:
AAA|25|1|2... (1 Reply)
Hi folks,
I have the following data.Any help is greatly appreciated.
order File_name
7222245 7222245.pdf
7222245 7222245a.pdf
7222245 7222245b.pdf
7222245 7222245c.pdf
7222245 7222245d.pdf
7222250 ... (1 Reply)
File A
I have list of :
ABCND1
ABCND2
ABCnd3
ABCnd4
I want file B like below
Start+
S Pate=ABCND1 AAlo1
S Pate=ABCND1 Q1234
S Pate=ABCND1,P12345 (7 Replies)
Hi Guys,
I have file A.txt
File A Data
AK1521
AK2536
AK3164
I want create text file of all data above and write some data on each file.
want Output on below folder
/home/kka/out
AK1521.txt
Hi
Welocme (3 Replies)
Hi All,
I have two files. File1 and File2.
Want to create another file with all the records of File1 those are not present in File2.
Please guide.
Thanks in advanced.
Anupam (3 Replies)
I have looked through several threads regarding merging files with awk and attempted using join however have been unsuccessful likely as I do not fully understand awk.
What I am attempting is to take a csv file which could be between 1 and 15,000 lines with 5 colums and another csv file that will... (4 Replies)
Discussion started by: cdubu2
4 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)