Programming :: Using Grep To Find EXACT MATCH?
Nov 11, 2010
I'm trying to find exact matches of some users in the /etc/passwd file using "grep -w", but it doesn't always work. For example, I have the following users:[URl].. So, let's say, I want to search for the user "stewart" (which doesn't exist)
[Code]...
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Oct 21, 2010
I have the following query:
Code:
$sql="SELECT table1.datetime, table1.user_id, table2.ip, FROM table1,table2 WHERE id='$id' AND (table1.id = table2.id AND table1.datetime = table2.datetime)";
In table2 the datetime fields are about 1 to 2 seconds off due to the source of the data, which I cannot change.
Is it possible via a query match table1.datetime & table2.datetime by HH:MM (ie. to the minute instead of to the second)?
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Aug 6, 2010
1) I need to search a field value to check for exact 0. If the number is 0, it should throw error.
The line to be searched looks like as below. "Output Rows [1], Affected Rows [1], Applied Rows [1], Rejected Rows [0]"
Here I have to search whether the affected rows is 0. But the code below picks up other values also (lie 10, 20.. etc). How do we write to get an exact match for 0? Code: affected=`echo ${line} | cut -f6 -d" " `
affectedcount='echo ${affected} |grep 0 ` 2) Also, I need to check whether the rejected rows > 0
Code: rejected=`echo ${line} | cut -f12 -d" " `
rejectedcount='echo {rejected} |grep [1-9]`
3)Can we combine these two statements in a better way to get the desired results?
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Aug 13, 2010
I have a sysctl.conf that has the following in it:
kernel.exec-shield-randomize = 1
kernel.exec-shield = 1
When I grep kernel.exec-shield I get both line, hence I keep over writing the kernel.exec-shield-randomize in my script because it finds them both for my sed commend.
How can I get an exact match with either sed/awk/grep in shell so I can do a find and replace?
Example: sed 's/^kernel.exec-shield =.*/kernel.exec-shield = 1/g' /etc/sysctl.conf will replace BOTH lines
Example: grep "^kernel.exec-shield" find both line and I want it to find only the exact line.
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Mar 17, 2010
I want to find out into some directory, all the files which names are composed of : A specific word README, a litteral "." and any string
file name sample like: "README.string"
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Nov 10, 2010
am trying to find a proper regex to match the two numbers in the following log entry.
Code:
15:08:16.142 INF Found 64468
15:08:16.142 ERR [Uniform test code=64469]
Basically the pattern I'm looking for will match the two different numbers spanned across two lines.Thought I need to use multi-line mode as follow but this doesn't match on [URL]...
Code:
/^($[0-9]{5}
[0-9]{5})$/m;
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Oct 27, 2010
I want to write some code to search for a specific string in a text file, but without using grep command.
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Dec 15, 2010
if I'd a file like this
something
somethine123
begin something end
begin xyz end
somethingelse
and I want to find the strings only between begin and end, exluding begin and end; How can I grep that?
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Jun 16, 2010
I have inherited a wordpress theme with a folder of images that I think are no longer being used. I wanted to find the orphaned images using grep, so I wrote this script:
Code:
#!/bin/bash
echo $PWD
for i in *.*; do
cd ..
[Code].....
Its seems like I got some false positives out of it, but it worked pretty ok. I guess. :| Of course, it is not checking for images in the content of the database.
Orphan finding has to be a wheel that is already invented.
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Mar 20, 2010
Getting the list of files in the root directory that have changed less than 10 hours earlier, using grep, but without the directories.
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Jan 10, 2011
I have a list of urls like code...
How can I use grep to match the domain names only?
All the urls have a / after the domain. And there are a lot of tlds, not sure how many, the list is quite big.
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Jun 9, 2010
I want to traverse a directory and get a list of files that contain a set of patterns. I assumed I could use grep for this, but I having trouble getting grep to only return files that match ALL patterns. Here's what I've come up with so far:
Code:
grep --recursive --file=searchpatterns.txt --files-with-matches somedirectory/*
However, this gives me a list of files that match ANY of the patterns in the searchpatterns.txt file. I want to match ALL of the patterns. I've looked through the man page, but can't find anything that allows me to change the "OR" to "AND" for multiple patterns.
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Feb 3, 2011
I have done this before but i cant really recall now
I have a text file and i want to grep the word "interface" and 10 lines following it. I think there was some switch like grep -A or something ?
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May 28, 2010
I'm trying to math all class references in a C++ file using grep with regular expression. I'm trying to know if a specific include is usuless or not, so I have to know if there is a refence in cpp. I wrote this RE that searches for a reference from class ABCZ, but unfortunately it isn't working as I espected:
grep -E '^[^(/*)(//)].*[^a-zA-Z]ABCZ[]*[*(<:;,{& ]'
^[^(/*)(//)] don't math comments in the begging of the line ( // or /* )
.* followed by any character
[code]....
Well, I can get patterns like this:
class Test: public ABCZ{
class Test: public ABCZ {
class Test : public ABCZ<T>
[code]....
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Dec 10, 2010
regex in grep? I need to match ANYTHING in the following with any character combination (something like * in findstr in C): grep "Delivery of nonspam" /var/log/mail.log | grep "to [URL]"
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Jun 2, 2011
I am trying to use grep to only tell me files that include both words matching in a pattern file. However when i specify:
grep -f <pattern file> <file>
It pulls out anything that matches one or the other.
Not both.
how to get it to match AND not OR.
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Nov 22, 2010
I need to kind of grep within grep. My input file would be something like:
[Code]....
and I need to find the first occurrence of hello before MY PATTERN (hello 9008 in this case), so the output should be:
[Code]....
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Jan 27, 2010
Assume I am sitting in front of a runnning CentOS.How can I find out the EXACT version of this installation?I am not (only) talking about the major release (e.g. 5) but the sub release (5.1 or 5.2 or 5.3 or...)The about box shows something about Gnome but not the details for the CentOS.
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Jun 17, 2010
I use the following command to find under /var some param in my script
grep -R "param" /var/* 2>/dev/null |grep -wq "param"
my problem is that: after grep find the param in file grep continue to search until all searches under /var/* will completed
How to perform stop immediately after grep match the param word
For example when I run the: grep -R "param" /var/* 2>/dev/null |grep -wq "param"
grep find the param after one second.
But grep continue to Search other same param on other files and its take almost 30 seconds
How to stop the grep immediately after param match?
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Sep 11, 2009
I am trying to do a find/grep/wc command to find matching files, print the filename and then the word count of a specific pattern per file. Here is my best (non-working) attempt so far:
wc `find . ( -name "*.as" -o -name "*.mxml" ) -exec grep -H HeightResizableList {}` ;
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Feb 28, 2011
I have used diff command in past.I faced a situation to which I did not had a cluehere are some text strings (which can be stored in a file)Quote:
CONFIG_XEN=y
CONFIG_XEN_PVHVM=y
CONFIG_XEN_MAX_DOMAIN_MEMORY=128
[code]...
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Feb 8, 2010
How do i find out the exact kernel parameters (from the grub config file) when the boot loader is corrupt. Seems like a catch 22 that I need the exact boot parameters when I cant get to a prompt to read the grub.conf file to being with.
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Aug 18, 2009
I have a file which has the words "splashimage and "splash". I would like to remove the word only "splash" from everywhere.
Using the following command code...
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Apr 1, 2011
I need to install g77 in this distribution, but an apt-cache search won't find any match.
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Mar 15, 2011
I have following 2 files
File1
10.1.1.1
10.1.2.1
10.1.3.1
File2
10.1.3.1
10.1.2.1
10.1.1.1
Both are reverse of each other. Now, basically if you see, the contents are same, but in different order. Is there any easy way in which i can find out like which items dont match between 2 files, regardless of order. Lets say i add 10.1.4.1 to File1. Now the result of such comparison should be only '10.1.4.1'. Currently if i am comparing both files using diff, it gives me all the lines.
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Mar 23, 2011
I have a server hosting 100+ websites. I need to quickly identify which websites are configured with a database. There are way too many to manually check every website for a PHP file with a database name. So, I created a list of all databases from MySQL and put them in a text file. I then exported the text file to a shell variable and used it in a for loop.
bash variable
Code:
DBLIST=`cat dblist.txt`
Example of $DBLIST
Code:
db1 db_testing2 database_clientname production words4cheap
for loop
Code:
for db in $DBLIST; do find . -type "f" -iname "*.php" -exec grep -i $db '{}' ; -print; done
Note: my find statement starts searching at . which is the directory that contains all of my websites and their data, each website is setup in a sub directory, identified by it's domain name.
Example: I'm in /var/www. Beneath /var/www are a list of directories:
[URL]
However, this is taking too long (it's been running most of the day) and I was wondering if there wasn't an easier way to accomplish what I'm trying to achieve?
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Apr 8, 2011
How awk and sed can be used to preg match strings? how would I go about matching a string like:
Code:
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Nov 2, 2010
I am looking for all the files that contain the text string 'moo.sql'. I ran the following:
find . -name '*.php' | grep -lir 'moo.sql' *
Unfortunately it seems to return non-php files in addition to php files. I thought the find portion of this would filter the file names so grep would only search php files.
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Dec 24, 2010
For searching a file or directory i normally use grep command. kindly can you guide me the difference between grep and find command. I have used both but that are the difference between them ? are the same or grep is new as comapird to find command.
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Dec 1, 2010
I'm trying to use grep to find the words in the dictionary that contain the letters "th" and the letter m.
I tried grep 'th m*.' Desktop/Dictionary/words(Thats where the destined dictionary word document is located)
grep 'th' Desktop/Dictionary/words works but only for the words with th. I have no idea of what expression to use to make it a unionized expression with m
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