All Questions
59
questions
2
votes
1
answer
950
views
grep misreads pattern from variable
I have a problem with escaped pattern put in grep.
My test file is:
export_cc = ${dir}/aaa/bbb/ccc
export_cc = ${dir}/aaa/bbb/eee
export_cc = ${dir}/aaa/bbb/ddd
export_cc = ${dir}/aaa/bbb/fff
...
- 185
3
votes
4
answers
20k
views
Wildcards for filepaths aren't working in grep [duplicate]
I need to grep words like these:
ABC-DEF
AB2-DEF
AB3-DEF
AB-DEF
So I was trying:
grep AB*-DEF
grep -w -AB*-DEF
grep -w AB*DEF
But neither of them are working.
- 825
2
votes
1
answer
14k
views
grep: Syntax error near unexpected token `('
I have this problem: I'm looking for a string inside file .
Syntax is:
grep -E ‘( ^ | [[:space:]] )[A-Z]{2}[[:digit:]]{2}((- | [[:space:]] )[[:alnum:]]{4}) {3} ’ (filename)
When I run this ...
- 23
9
votes
4
answers
41k
views
How do I perform xargs grep on grep output that has spaces?
I'm searching for files based on a regular expression, and then I'm trying to search those files for content. So, for example, I have something like
#Find all C++ files that match a certain pattern ...
- 500
1
vote
2
answers
955
views
How to put $@ in quotes?
My bash script looks like this:
#!/bin/bash
grep -r --color=always $@ . | nolong
The file is saved in /usr/bin/findstr
Everything's ok when I run this:
findstr hello
But when I run this:
findstr ...
- 11
1
vote
2
answers
2k
views
Why does regex with \\$\{ work with egrep, but not with sed?
Given a text like this
./RFF_09 -f${FILE} -c${COND}
inside a file, this egrep command will correctly match:
egrep './RFF(.*) (.*)-c\\$\{COND\}' file
but this sed command will not
sed -n "s:'./RFF(...
- 123
3
votes
2
answers
1k
views
Why does "grep '.*[s]' file" work and "grep .*[s] file" doesn't?
Comparing
grep '.*[s]' file
with
grep .*[s] file
Why do you need quotation marks to let this work properly? In the second case, grep seems trying to inspect every file with a period.
- 205
4
votes
4
answers
2k
views
fgrep beginning of line?
I'd like to use fgrep to handle searching literal words with periods and other meta-characters in grep, but I need to ensure the word is at the beginning of the line.
For example, fgrep 'miss.' will ...
- 933
2
votes
1
answer
662
views
Help with using quotes in grep searches
I have a file with variables in it of the form a(i)%b(j)%c where the a, b, and c are always the same, but the indices i and j may be different (including multiple characters). So I've played around ...
- 21
2
votes
1
answer
2k
views
Regex works in shell but not through Perl script
I'm having trouble executing a Perl script through the Unix shell using Perl's system command.
I've had more complex regex commands I had to adjust accordingly to convert from Unix to Perl, and they'...
- 259
0
votes
1
answer
147
views
Quote escaping struggle with grep and sed
I'm writing a bash script to extract data from html tags and I found this command in another thread : grep -o '<tr>.*</tr>' HTMLFILE | sed 's/\(<tr>\|<\/tr>\)//g' > NEWFILE, ...
- 25
5
votes
1
answer
7k
views
command: ls /etc | sort | grep d* is yielding no results but ls /etc | sort | grep p* lists entire directory
I am playing around with piping and grep tonight. I know that grep uses regex and that * means 0 or more occurrences of the preceding character. So the way I understand it is that if I do the ...
- 51
17
votes
2
answers
24k
views
Why do I have to escape a "dot" twice?
I know that we can escape a special character like *(){}$ with \ so as to be considered literals.
For example \* or \$
But in case of . I have to do it twice, like \\. otherwise it is considered ...
- 770
0
votes
3
answers
568
views
How do I match a string with symbols in a grep-kind of way? [duplicate]
I have a file with this contents (or similar):
# cat /var/www/htpasswd
foo:$apr1$73wJ8tiQ$HdaRYe2pUMqBf0ZpMJz6h/
and I'm trying to verify the presence of an entry in it, by matching it, like this:
#...
- 101
8
votes
5
answers
15k
views
bash event not found trying to match and exclude parenthesis in grep
In a very long line I'll summarize with:
(foo),(bar,baz(word,right),(end)
I want to print only:
(bar,baz(word,right
To match the second parenthesis, I exclude the word that follows the third ...
- 1,969