Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Escaping non-readable characters using grep, sed or awk
Top Forums UNIX for Dummies Questions & Answers Escaping non-readable characters using grep, sed or awk Post 302399819 by seanwpaul on Monday 1st of March 2010 05:06:28 PM
Old 03-01-2010
Hmmm

I had to add the [] brackets into the string, because it was filtering them out. Sadly, when I added them, it returned all rows.

I then reduced it to only look at the special characters I DO need: ":.[]()"
Code:
grep -F "20100207" crashers.txt | grep -v '[^A-Za-z0-9:\.\[\]\(\)]'

That still returns all four rows, not just the third.

I'll run that past a couple guys in the office here, see if that triggers an idea or three.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

escaping special characters in file name...

dear, I would like to rename files in a dir to another format, so I write a bash shell script to handle it. But my problem now is how to handle files having special characters like spaces, (, ): "a b c (d).doc" It seems that I need to escape those characters before applying the "mv" command.... (1 Reply)
Discussion started by: lau0001
1 Replies

2. Shell Programming and Scripting

Delete not readable characters

Hi All, I wanted to delete all the unwanted characters in the string. ie, to delete all the characters which are not alpha numeric values. var1="a./bc" var2='abc/\."123' like to get the output as print var1 abc print var2 abc123 Could you guys help me out pls. Your help is... (3 Replies)
Discussion started by: ajilesh
3 Replies

3. Shell Programming and Scripting

Escaping Special Characters-Help

Hi All, I am having a trouble in passing special characters to a script. As I am new to bash script I dont know how to go and solve this. mypwd=(a+sdfg!h# if i pass $mypwd to a bash script, it is not accepting "(,!,+ etc". It would be a great help if some one can help to escape these... (3 Replies)
Discussion started by: Tuxidow
3 Replies

4. Shell Programming and Scripting

Escaping Special characters

I want to append the following line to /var/spool/cron/root: */7 * * * * /root/'Linux CPU (EDF).sh' > /dev/null 2>&1 How to accomplish this using echo? ---------- Post updated at 04:09 PM ---------- Previous update was at 04:07 PM ---------- "Linux CPU (EDF)" is actually stored in a... (11 Replies)
Discussion started by: proactiveaditya
11 Replies

5. Shell Programming and Scripting

grep or sed. How to remove certain characters

Here is my problem. I have a list of phone numbers that I want to use only the last 4 digits as PINs for something I am working on. I have all the numbers in a file but now I want to be removed all items EXCEPT the last 4 digits. I have seen sed commands and some grep commands but I am... (10 Replies)
Discussion started by: Sucio
10 Replies

6. Shell Programming and Scripting

Help with escaping xml characters in a file

Hi, I have a file xy.csv with the following data separated by pipe (|): BC-NACO|12>ISA43<TEST| A & A INC|FAMOUS'S AL| i need to escape the xml characters as below BC-NACO|12&gt;ISA43&lt;TEST| A &amp; A INC|FAMOUS&apos;S AL| Please advise (5 Replies)
Discussion started by: prasannarajesh
5 Replies

7. Shell Programming and Scripting

SED equivalent for grep -w -f with pattern having special characters

I'm looking for SED equivalent for grep -w -f. All I want is to search a list of patterns from a file. Also If the pattern doesn't match I do not want "null returned", rather I would prefer some text as place holder say "BLANK LINE" as I intend to process the output file based on line number. ... (1 Reply)
Discussion started by: novice_man
1 Replies

8. Shell Programming and Scripting

Escaping special characters

I'm attempting a little hack to get grep to highlight (change foreground color to red) a found string. Assuming a target file "test" consisting of the word "albert": My executable "algrep" consists of this: grep $1 $2 | sed "s/$1/\\\033 And when run: algrep al test Produces this:... (2 Replies)
Discussion started by: tiggyboo
2 Replies

9. Shell Programming and Scripting

sed replacing specific characters and control characters by escaping

sed -e "s// /g" old.txt > new.txt While I do know some control characters need to be escaped, can normal characters also be escaped and still work the same way? Basically I do not know all control characters that have a special meaning, for example, ?, ., % have a meaning and have to be escaped... (11 Replies)
Discussion started by: ijustneeda
11 Replies

10. Shell Programming and Scripting

sed or awk grep, that will only get the line with more characters.

Is there a command for sed and awk that will only sort the line with more characters? #cat file 123 12345 12 asdgjljhhho bac ss Output: asdgjljhhho #cat file2 11.2 12345.00 21.222 12345678.10 (2 Replies)
Discussion started by: invinzin21
2 Replies

LEARN ABOUT BSD

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
All times are GMT -4. The time now is 08:29 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy