How to read entire output from a file?

10 More Discussions You Might Find Interesting

1. Solaris

User with read-only to entire filesystem

Is this even possible? Its a request for external auditors to login remotely.

2. Shell Programming and Scripting

Bash script read specific value from files of an entire folder

Hello, I heva a problem creating a script that read specifc value from all the files of an entire folder I have a number of email files into a directory and i need to extrect from each file 2 specific values. After that i have to put them into a new file that looks like that: To: value1 ...

3. Shell Programming and Scripting

How to read each line from input file, assign variables, and echo to output file?

I've got a file that looks like this (spaces before first entries intentional): 12345650-000005000GL140227 ANNUAL HELC FEE EN 22345650-000005000GL140227 ANNUAL HELC FEE EN 32345650-000005000GL140227 ANNUAL HELC FEE EN I want to read through the file line by line,...

4. Shell Programming and Scripting

Redirecting output for the entire script

Hi All, I am trying to redirect output for every line in a korn shell script that is going to generate output and append it to a log file. I have been doing this after EACH and every line that is going to produce output: command 1 >> test.log command 2 >> test.log command 3 >>...

5. Shell Programming and Scripting

Read file and for each line replace two variables, add strings and save output in another file

Hi All, I have a file, let's call it "info.tmp" that contains data like this .. ABC123456 PCX333445 BCD789833 I need to read "info.tmp" and for each line add strings in a way that the final output is put /logs/ua/dummy.trigger 'AAA00001.FTP.XXX.BLA03A01.xxxxxx(+1)' where XXX...

6. Shell Programming and Scripting

How to Read the entire file using while loop

Guys, I am trying to read the whole file using while loop but when i run the ssh part of the script it reads only the first line and exit after that. There are in total 134 lines in the file, but when the output is redirected, it does only for one line and comes to command prompt. pls help.....

7. UNIX for Dummies Questions & Answers

Read from a file then filter the output

Hi i need a script which reads a certain file and then display it on the screen. The thing is i need to filter the display output. this is an example of the file which is to be loaded in the script. asdfg1.1.1|98 hjkldfe4.0.3|123 asdzxzvdweradfsdafascv10.0.10|123456789...

8. UNIX for Advanced & Expert Users

Read the entire output fired by ps command

Actually I want to display the entire output fired by ps command. My output gets trucated after 80 chars. Thus, i am not able to see the entire command running when i give a ps -eaf .... Does anyone know how do i display the entire output fired by ps command .. (i.e the command along with...

9. Shell Programming and Scripting

read file and output message

hi, I have a baby.txt file with two type of message: xxxxxxxx is missing xxxxxxxxxxx is not missing xxxx is missing xxxxxxxx is not missing xxxxxxxx is not missing For the above, I need to read file and get all "xxxx is missing" and write into baby_missing.txt. If no message "xxxxx is...

10. Shell Programming and Scripting

store output to a file and read from it

Hello all, I need to run snoop command for a period of time (a day) and extract remote host column from it to find out who is accessing my server. When I run the following on the command line it works snoop -port 22 | awk '{print $3}' but when I do snoop -port 22 | awk '{print $3}' | while...

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)

UNIX for Dummies Questions & Answers