Grepping issue.. Post: 302171129

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1. UNIX for Dummies Questions & Answers

grepping

Is there a way to grep for something and then print out 10 lines after it. for example if I want to grep for a word, then output the following 10 or whatever number of lines after the word.

2. UNIX for Dummies Questions & Answers

Can you grep for a sentence. I have to search logs everyday at work and I was wondering if I could search for a string of words instead of just one. for example, if I had to find this sentence: "Received HTTP message type" How would I grep it

3. Shell Programming and Scripting

grepping around

Using shell scripts, I use grep to find the word �error� in a log file: grep error this.log. How can I print or get the line 3 lines below the line that word �error� is located? Thanks in advance for your response.

4. Shell Programming and Scripting

Please help on grepping

Hi All, I have a log file and I want to parse the logfile with a script.A sample text is shown below: I would grep on "return code " on this file. Any idea how the lines above and below the grep patterns could also be extracted. Thanks! nua7 The runLoggingInstall return code is 0...

5. UNIX for Dummies Questions & Answers

Help with grepping within variables

I've got a script at the moment that looks like this: if then echo "How many hours would you like users to have logged in for? (single digits)" read hours tim= echo "These are the users who were logged in for $hours...

6. UNIX for Dummies Questions & Answers

grepping a variable

I need to pass a parameter that will then be grepped. I need it to grep /paramater and then have a space so if 123 was passed my grep would be grep '/123 ' sample.log this works fine from the command line but when i try and set it searchThis="/$2 " and then run grep $searchThis...

7. Shell Programming and Scripting

grepping by digit

Hi all, Need your help here. I have a file with thousand of lines, as shown in example below KDKJAA 98324 OIDSAJ 324 KJAJAK 100 KJKAJK 89 JOIJOI 21 JDKDJL 12 UOIUOD 10 UDUYDS 8 UIUHKK 6 I would like to grep using...

8. UNIX for Dummies Questions & Answers

Grepping using -w and dashes (-)

I have a script to sort a list of arbitrary hosts and determine if they are supported by grepping them into a master supported list. I cut all the suffixes of the hosts in the arbitrary list, leaving the "short" hostname if you will, then grep -w them into the master list. For example: ...

9. Shell Programming and Scripting

Grepping more than one word

Dear Experts, Need your help. Typically we use "grep" to search and display a pattern in a txt file. However, here what we want is, we want to grep a line which contains 4 words any where in a line. For example. File has 10,000,000 lines in it out of which there is a particular line which...

10. Shell Programming and Scripting

Performance issue in Grepping large files

I have around 300 files(*.rdf,*.fmb,*.pll,*.ctl,*.sh,*.sql,*.prog) which are of large size. Around 8000 keywords(which will be in the file $keywordfile) needed to be searched inside those files. If a keyword is found in a file..I have to insert the filename,extension,catagoery,keyword,occurrence...

LEARN ABOUT X11R4

truncate

TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME

       truncate - shrink or extend the size of a file to the specified size

SYNOPSIS

       truncate OPTION... FILE...

DESCRIPTION

       Shrink or extend the size of each FILE to the specified size

       A FILE argument that does not exist is created.

       If  a  FILE  is	larger than the specified size, the extra data is lost.  If a FILE is shorter, it is extended and the extended part (hole)
       reads as zero bytes.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --no-create
	      do not create any files

       -o, --io-blocks
	      treat SIZE as number of IO blocks instead of bytes

       -r, --reference=RFILE
	      base size on RFILE

       -s, --size=SIZE
	      set or adjust the file size by SIZE bytes

       --help display this help and exit

       --version
	      output version information and exit

       The SIZE argument is an integer and optional unit (example: 10K is 10*1024).  Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (pow-
       ers of 1000).

       SIZE  may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round
       down to multiple of, '%' round up to multiple of.

AUTHOR

       Written by Padraig Brady.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report truncate translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       dd(1), truncate(2), ftruncate(2)

       Full documentation at: <http://www.gnu.org/software/coreutils/truncate>
       or available locally via: info '(coreutils) truncate invocation'

GNU coreutils 8.28						   January 2018 						       TRUNCATE(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

grepping

Discussion started by: eloquent99

2. UNIX for Dummies Questions & Answers

grepping for a sentence