General :: Grep Fails In Shell Script When String Not Found / Why Is So?
May 3, 2011
I am having trouble using grep command. I want to search for each line in first file in second file and if they are present, write to file called successfile else to failfile. Below is the code
what is happening is, when the first failure occurs (when a line in first file is not present in second file), the script is killed.
Can anyone please tell me what I am doing wrong? code...
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Jul 29, 2010
Today, i checking my error log of Apache. I have look many IP brute scan URLo, i collect, export that to ip.txt and i need grep IP with connection >=8I don't know command to solve that. Example ip.txtQuote:
101 210.13.73.30
161 58.210.77.98
164 115.168.71.87
[code]....
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Apr 28, 2011
Q: Is there any way to use grep and sed with a string variable rather than with a file?
The problem: Im running through a LARGE (about 10,000 lines) xhtml file and need to replace every instance of lines beginning <p>~
The following code works but takes a long time mainlly because an in/out operation needs to be carried out on each line. If I could read from a string rather than a file it would take a much shorter time!
Code:
#!/bin/bash
count=$((0))
>tpf
echo "waiting....."
[Code].....
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Apr 29, 2010
How do I find a string in files in a directory. And these file names begin with letter a. I also want to get the number of occurrences of this string from the grep I run.
I tried this:
cat * | grep -c string but it searches all files. I just want to search files that begin with letter a
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Jul 28, 2010
I am using grep to filter out directories I am not interested in like this:svn stat | grep -v data/charts | grep -v lib/model | grep -v web/picsIt seems a bit "hacky". Is there a better way to specify more than one string to ignore, so that I dont have to chain multiple grep commands?
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Jan 19, 2010
I am searching for Class declaration on a site with hundreds of PHP files, how can I do this in the current folder and subfolders using GREP?
I tested cding to the folder and then something like
grep -r 'class MyClass' *.php
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Apr 11, 2011
I want to match some filename in some text, but the filenames I have no control of, so "[" can "]" can appear in the filenames.so do I always have to use sed to addslashes to these variables before I have to grep them? and what other characters have I missed other than "[", "]", "."?
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Sep 3, 2010
I am trying to grep a particular string from the files of 2 different servers without copying and calculate the total count of its occurence on both files. File structure is same on both servers and for reference as follows:
Code:
27-Aug-2010 10:04:30,601|919122874903|phtunes_app|1282243292627|NotifySmsReception|DMGenerateLogInterceptor - ExternalTransactionID:SDP-DM-26713018, TransactionStatus:Requested
27-Aug-2010
[code]....
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Jan 19, 2010
I need to search a text file for a string of numbers which are different lengths, and always are between number=" and " like:
number="1234567890"
number="22390"
I need to grab those numbers and pipe each one to a line in a file. I've already tried something with awk and that didn't seem to work.
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Feb 5, 2010
I'm trying to grep the output of ngrep. Unfortunately when I add another grep to the pipeline, I get no output at all. It can be some other command too - cat / grep / tee - everything breaks the chain. Example:
[Code]....
If I use cat somefile instead of ngrep at the start, everything works as expected.
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Aug 23, 2010
I am trying to monitor how long an ldap search takes and maybe notify or something that a search takes longer than say 10 seconds.
Code:
tail -n 1000 /var/log/ldap.log
for SRCH in $( cat monitorldap.log |grep 'SRCH'); do
echo search string is
echo $SRCH
[Code]....
ok, so to start off with it doesn't appear to get the whole line, just a piece "Aug". How can I get the whole line into a variable so I can then cut it up into the pieces I need?
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May 7, 2011
How to grep a string like "ab?c12345678" where 3rd character is unknown, while other characters are known.
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Feb 4, 2010
I have a string variable
var1=<default>111</default>
I want the value between default tags 111 in this case.
I treid to use ${var1:10:3}
But the execution gived "bad substitution' error. If the tags are removed and substring is fetched it works fine. Is there any other was to get substring in a string with tags.
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Feb 9, 2010
I am using Sun 5.9.
I am putting the value "Feb 10" in variable 'c' here.
Code:
-bash-3.00$ c=`date | awk '{print $2 " " $3}'`
-bash-3.00$ echo $c
Feb 10
But when I am grep-ing value of 'c', I am getting this error.
Code:
-bash-3.00$ ls -lrth | grep $c
grep: can't open 10
This is because there is a space between "Feb" and "10".
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Sep 1, 2009
I have a dataset (see example below) that I would like to go through and copy all lines containing a certain string ("LGIG") plus the line immediately following that line to a new file. I have no problem grepping lines containing the string LGIG but I'm lost how to translate that to line number and shift up one line number for each instance of that string.
Example input file:
[code].....
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Apr 29, 2010
Assume I have a text file as belowabcdaaaaaaagfgkhahahahahahhahhgfThen gf would be returned
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Oct 10, 2010
I wanted to randomize the comma separated string.String like "test1,test34,test5,test6".And it would be displayed differently when I ran each time.
Expected output like "test5,test6,test1,test34".
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Mar 15, 2011
I would like to evaluate a postfix string using bash shell script,but I do not know how to start.
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Jan 13, 2011
I have a mail.log file, of which I want to redirect only the search strings of the sender from=<example.sender@exampledomain.com> and the size size=4537 to a file.
In every case the sender string starts as from=<> and the size string starts as size=
What would be the grep command to redirect only the two search strings to a .txt file?
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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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Aug 4, 2009
I am trying to delete these symbols "[ ]" from a file but it says string not found. I tried: %s/[//g while editing the file not working also tried sed -e '/[/d' and sed '/]/d' still no job.
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Sep 1, 2011
how to search for those files which contain word "AM_COLLECTION=22". I need to know all the files with this string. ( I know the grep command can do it but either
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May 5, 2010
in the access logs i have this:
Code:
IP.IP.IP.IP - - [01/May/2010:11:21:10 -0400] "BIG STRING" 414 250
how can i grep and pull the IP based on the request string?
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Jul 27, 2010
Someone gave me a script that would tar then gzip my music directory, as well as remove the previous days backup. I have it set up in crontab, but it appears to have stopped working the last couple days, so i tried running it manually. Below is the script and the output I got. Any ideas why its failing now? I don't think anything changed on the server, maybe someone installed updates but idk why that would affect this.
Here's the musicbackup.sh script code...
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Nov 20, 2010
I'm attempting to mount a Windows dir to a mount point on my Linux VMWare instance running on my Windows 7 machine. I am using a shell file to automatically mount the directory I want at bootup. However, I'm finding that Linux always mounts to a directory at the top of my C: file structure for some reason, and I can't figure out why.
Here's the dir structure:
C:/target (don't want to mount this, but this is what gets mounted)
C:/Users/me/target (this is what I want to mount to)
Here's my shell script:
Code:
mount.cifs //192.168.56.1/Users/me/target /mnt/target -o credentials=/root/credentials.auth,domain=mycomputer,uid=1001,gid=1001,rw
And here's what I get when I enter mount at the prompt:
Code:
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/sda1 on /boot type ext3 (rw)
none on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
If this means anything my Virtual Machine has a single hard drive SCSI, which I believe is /dev/sda1. I don't see anything from mount that would indicate that the c:/target dir is getting hard-mounted somehow from the /etc/vfstab file, but maybe I just don't understand how mounting works...
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Feb 12, 2011
When I try to launch application which runs in another window (not inside shell), it always fails with this kind of message: (example from gnome-terminal)
Code:
** (gnome-terminal:2477): WARNING **: Failed to connect to the session manager: None of the authentication protocols specified are supported Failed to get the session bus: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Falling back to non-factory mode. Failed to summon the GConf demon; exiting. Failed to contact configuration server; the most common cause is a missing or misconfigured D-Bus session bus daemon. See [URL] for information. (Details - 1: Failed to get connection to session: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.) I am running it as root, have GNOME installed and running, and also fresh install of gconf.
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Feb 9, 2010
This is a very simple problem, but I'm scratching my head with others..
In composing a simple shell script in class, we can't seem to get the script to execute fully. script was formatted as follows.
#!/bin/bash
echo "good bye for now"
exit
did, Chmod 755 to make executable
type file name "bye"
runs but wont exit.....
it just echos the type"good bye for now
The instructor says it works for him at home....
But it wont work in class...
Is there a reason it wont "exit" the shell as commanded ?
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Nov 10, 2010
Code:
grep -r $SEARCHDIR --include="day_$YYYY-$MM-*" -h -o -e PATTERN
The above command does exactly what I want: limit the search of files in $SEARCHDIR to those specified by --include.
I use double quotes rather than single quotes because of the shell variables. I would have thought this would cause the shell to expand the "*" but this doesn't seem to be the case.
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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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May 1, 2011
My script.
This is may script:
Code:
Problem: Output file doest not exclude the values in grep -av
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