How to grep only some part of character?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Extract a part of grep output

Hi, On AIX 7 I have : grep 's_ohs_instance_loc' $CONTEXT_FILE <ohs_instance_loc oa_var="s_ohs_instance_loc">/u01/appl_top/env/fs1/FMW_Home/webtier/instances/EBS_web_env_OHS1</ohs_instance_loc> But I need only this part:...

2. Programming

Grep part of dataframe in R?

Seems not very post about R language. Here is one: How to grep a sublist of a list like grep -f in unix? say I have a dataframe ID v1 v2 v3 A 1 3 4 B 4 5 6 C 7 8 9 D 1 3 4 E 1 3 3 F 2 4 5 and I only need ID v1 v2 v3 A 1 3 4 C 7 8 9 E 1 3 3 F 2 4 5 by like grep...

3. Shell Programming and Scripting

Return part of string after X numbers of a character

My input strings look something like this: /dev/vs/dsk/group/vol I want to print just "group" out of the line... which is always found between the 4th and 5th "/" in the string. I figure I have to use awk, sed, or some combination to do this, but I've searched the forums and can't find...

4. UNIX for Dummies Questions & Answers

can I grep a part of one line ?

<exp code="12556a" message="ok, fine4" displayMessage="jksdfj ksd" \> <exp code="123456a" message="ok, 2fine" displayMessage="jksdfj ksd" \> <exp code="12dfgda" message="1ok, fine" displayMessage="jksdfj ksd" \> now I want to cut code attribute and message attribute, such as ...

5. Shell Programming and Scripting

How to get a part of the line(need help in using grep)

Hi, Suppose, DBconnection=jdbc: oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=x.x.x.x)(PORT=YYYY))(LOAD_BALANCE=yes)(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=project_db1))) This is a part of a file <filename> . I Need to get the value of SERVICE_NAME from this line… The...

6. UNIX for Dummies Questions & Answers

How to use grep to get only part of a line...

Hello All. I have an output file which contains the phrase "Total DFT Energy =" and then a number. This occurs many times in the output file, and what I want is to pipe the numbers (which are all different) to a file so I can plot them. How do I grep "Total DFT Energy =" and then get the numbers...

7. Shell Programming and Scripting

grep part of file name

Hi, I have a problem to use grep in my script . If I want to grep the file for example : PTWO9089.txt The code below works . grep ^PONE But, I dont know on how to grep the file like this 9066PTWO.txt I'll try to use this code : grep PTWO^ ,but it doesn't work. For your info, the...

8. Shell Programming and Scripting

Grep part of the line

How do I print only the values of the variables from set or env. For example I have the lines USER=USER XYZ='text' SHELL=/bin/bash How do I print only the part after or starting from = Let's say I have those lines in a list X If I run Y = echo $X | grep -o "=*$" Y won't contain...

9. Shell Programming and Scripting

grep a part of a line

Hi, In a file FILE, there is a line like this one MOLECULE C2 H2 I want to extract "C2 H2". I can do it in two step in a script : VARIABLE="`grep MOLECULE FILE`" # Assign "MOLECULE C2 H2" VARIABLE=`echo ${VARIABLE/"MOLECULE "}` # Remove "MOLECULE ". Then, $echo $VARIABLE gives C2...

10. UNIX for Dummies Questions & Answers

grep within certain part of file

Hi, Is it possible to grep only on a certain part of a file? Say I have file in.txt which contains below: 11/16 13:07:19.5436 --- ERROR 123 detected. 11/16 13:08:19.5436 --- Generating a <reading> event 11/16 13:08:19.7784 ---- Sending a <writing> event 11/16 14:08:37.4516 ---...

LEARN ABOUT DEBIAN

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)

Shell Programming and Scripting