I'm trying to make a shell script, and for part of it I need to search through a file, find the ip in the file, and save ONLY the ip to another file. ( not the entire line that its on ) I understand grep has wildcards, where I could do something like, "grep (...........) traceroute-output for an ip address.
View 3 RepliesI searched and I found a few threads on this but none answered my question really.I'm using:
Code:
curl www.foo.com | grep '<h2>.*.</h2>'
Basically I want to extract all instances of
Code:
<h2>Blah blah blah</h2>
from the page source, but it's not giving me that, it gives me <h2>.. followed by a loads of other stuff that I don't want. I haven't used wildcards with grep before so I don't really know whether I'm doing it right or not.
After running the following command, I get:
[root@yukiko /]# find / -iname .bashrc
/home/clamav/.bashrc
/home/vpopmail/.bashrc
/etc/skel/.bashrc
/root/.bashrc
But I would like to have a command that prints a specific line by supplying the command with the line number, for example:
[root@yukiko /]# find / -iname .bashrc | getline(2)
/home/vpopmail/.bashrc
Is there such a command on CentOS?
Is there a way to do a batch renames of files that will keep each individual filename, but change it in the way I want?
The specific issue is this. I have a harddrive with something like 1300 movies on it. They're all organized alphabetically, but there are like 200 movies that begin with 'The'. I want to rename all of these movies that begin with The so that the The at the beginning is dropped and added at the end (for example, turn "The Shawshank Redemption" into "Shawshank Redemption, The"). I'd like to do this with a simple command if its possible.
If I have these lines...
How can I remove the (X) part from the end of all those? For example, when I cat the file which contains those, I just want to see those lines without the (X)...
why isnt this working as i am expecting:
Code:
[schneidz@hyper temp]$ cat example.tmp
hello world
[code]....
I have found this from a site [url]
Code:
But it does not work for me, segfault.
The below program is giving unpredictable and wrong output when I compile with g++ under Ubuntu OS , tried with the complier avilable with Ubuntu 8.04 and Ubuntu 10.04 LTS.
But it works fine when complied and ran Redhat g++ 3.4.6
copy string a to string b and change string b with toupper() and count the chars
View 3 Replies View RelatedI want to replace a string of directory path in a string to empty:
Code:
But this doesnt seem to give me the desired thing:
Code:
This gives the desired outcome, but its specific, i need a variable in the sed not a string. And if I replace STRING="/mnt/sda1/record/$dd/" then I cant use it for something else, cause its has all the weird backslashes now.
i have a file name using the following pattern:
PREFIX: AR
SOURCE: LEGACY
DATETIME: YYYYMMDD_HH24MISS
SUFFIX: .txt
sample filename:AR_LEGACY_20101104_105500.txti want to extract the source which is LEGACY in this case. how do i do this using shell?
i use this script to get the time and date of back and fourth transactions for a particular execution id. I use a substr command on the 5th column to to cut the milli seconds off the time value. - otherwise the times would look like 08:30:04.235
grep <executionID> <auditfile> | awk '{ print $1, $2, $3, $4, substr($5,1,8}
FIX -> Mon 3/1/2010 08:30:04
FIX <- Mon 3/1/2010 08:32:36
FIX <- Mon 3/1/2010 08:35:08
[code].....
anyhow - i append two sed commands to further clarify the direction of the message.
awk '{ print $1, $2, $3, $4, substr($5,1,8} | sed -e 's/->/ ->IN/g' | sed -e 's/<-/<-OUT/g'
FIX -> IN Mon 3/1/2010 08:30:04
FIX <- OUT Mon 3/1/2010 08:32:36
[code]....
I tried using an awk gsub () command within the string instead of the two seds, but it did not work:
awk '{ print gsub(/<regex>/, <replace with>,$1), $2, $3, $4, substr($5,1,8}
the sed works ok, but it would be cooler to make the replacement within the awk command:
gsub(/->/,-> IN, $1)
Is there a way where i could replace the value of the $1 column in the awk print string?
My script.
This is may script:
Code:
Problem: Output file doest not exclude the values in grep -av
Moving right along, I have a folder of MP3 files containing various Movie sound tracks and scores. I'm using Audio Tag Tool to tag all the files at once with an "Artist" of "Soundtrack", and to inherit the "Title" tag from the file name. After that, I will rename all the files (Using Audio Tag Tool -- awesome program, btw) with the format "<Artist> - <Title>.mp3"
The problem, is many of my files already contain the string "Soundtrack", which would be redundant. I happen to be a perfectionist, so I'm unable to ignore it and move on. Hence my question to you fine folk: I want to delete all instances of "soundtrack" (-i case irrelevant) in the filenames before I go through the above steps. But, its not quite that simple. This is a sample of some of the file names:
[Code]....
I'm try the use wildcards for file searches in Nautilus (ctrl+s) but using sets and character classes doesn't return any results. For example
[[:upper:]]*
[![:digit]]*
*[[:alpha:]]
[crm]*
Is this kind of notation supported in Ubuntu or do I have something wrong in my syntax.
I've got an interesting problem when it comes to wildcard entries in bind. If I put the following in:
qa.express IN A 172.16.0.10
* IN A 172.17.1.156
If I then look up "express.example.com" it doesn't return an answer - it *should* return 172.17.1.156, but it won't unless I put that hostname in specifically. qa.express.example.com resolves as expected.
I'm struggling with the Vim find/replace command using wildcards.
I have several, big html files with lots of instances of: <p stuffiwanttoremove>
I've been trying the Vim command: %s/<p *>/<p>/ge
but it doesn't seem to work.
Does anybody know what I'm doing wrong?
I realise there may be alternatives to this (eg a bash script)
I want to make a keyboard shortcut that runs the following command:
Code:
smplayer /tmp/Flash*
This is to play things as ..... videos etc. in smplayer using vdpau instead of the laggy flashplayer
The wildcard * works in terminals, but not in the command of the shortcut or in the Alt-F2 launcher... Could anyone point me to what I could write instead?
I am trying to clean up a collection of music files, often in windows i receive errors on the collection because some of the files have a "?" question mark in the file name, in windows this is not a valid character for file names. How can i search/find files with a question mark in the name? Each time i try to search for "?" i receive a list of items that match a wildcard search where ? is a wildcard. I want to find file names that actually contain the character "?".
View 2 Replies View RelatedI am cleaning up some text files to put on a website and am using the find/replace feature of Gedit extensively. The only problem I am having is that I can't find a way to use wildcards. For instance, I want to use the "?" and "*" in the same or similar way you do in bash. I already know that:
Represents a carriage return, and that is great, but I want to do something like: "?." to replace "A.", "B.", "1.", "2." with just plain spaces. The document in question is written in narrative, but has a bunch of outline markers in it, and I want to remove the outline markers.
I tried "escaping" the characters in a similar way as by using "?.", but that didn't work. Google was not very fruitful, and the Gedit help seems to be Gnome help and includes all kinds of useless info (for my problem) about wildcards in other programs.
having bit of a trouble with path expansion of strings that contain some whitespace and wildcards First my script sources a configuration file that contains array assignments
Code:
...
BACKUP_TARGET_FILES[2]=/boot/config-* # no problems
BACKUP_TARGET_FILES[3]="/root/random dir with space/file*" # this is the problem
...
then later in the script I want to expand BACKUP_TARGET_FILES elements as below
Code:
IFS_DEFAULT="$IFS"
shopt -s nullglob
shopt -s dotglob
IFS=
[code]....
this code seems to work but I'm not quite satisfied with it. I'd like to get rid those IFS changes, but haven't found out a solution as of yet. Problem with default IFS seems to be that with it neither $pattern or "$pattern" work; it either interprets pattern as multiple words (because of spaces) and so expands to wrong paths or it ignores * because it's within quotes.
I've been trying to understand pthread in C a little better. So I made a simple program that takes in a string from the command line and creates a thread to print the string. I've looked online and copied the basic concepts but there are something things I'm confused about. The programs works just fine, but I have questions. Here's what I have so far.
[Code]....
One thing I'd like to know is why the 3rd argument in the pthread_create function which is my SendMessage function needs to be typecasted to a void pointer and then send the address of the function. Also as for the 4th argument, I would see typecasting to void pointer in some of the pthread examples I saw online, but in my case I'm passing a char pointer, would this be correct? In which case would I ever want to pass a void pointer?
Do I need a pthread_exit(NULL) in my main and in the SendMessage function? If so, why? I added the sleep() function so that I could let the pthread_exit function in my SendMessage function execute first. I simply saw that the online examples on pthread had pthread_exit() in both locations.
I have a line in a text file that has 40 random characters within a tag and i want to change the characters to a new set of 40 random characters (alphanumeric a-z 0-9 etc)
The line in the text file looks like this:
Quote:
How would i go about doing that?
Also second question same as the above but how would i remove them instead of replacing them?
If I have a word in a text file and I need to replace it by another word (for example, i need to replace abc by fff) so what is the command I can type it?
I am using vi editor.
I have a String that I would like to sign using a given RSA Private key. I thought this would be relatively easy but I have not been able to find out how to do it, unless I'm looking to far into a simple problem. Do i have to put the string into a file, and sign the file, or can i just sign the string/message?
View 7 Replies View RelatedI have a set of lines as ahown below:
Leon went to school
Leon came back from school..
Leon had dinner...
I have to replace the line containing "dinner" by a single string LUNCH...
I need to creates string suffixes out of a Reference string. for eg. suffixes of abcdefg will be
1)bcdefg
2)cdefg
3)defg
and so on...
create an array of pointers to point to the first few characters and then use that pointer to print the rest of the string.But when i print using the pointer i get GARBAGE values! shudn't std::cout<<ptr[w] print the string following the char it is pointing to? why do i get garbage values?
So if I'm given a location of a file like:
How can I just take the type of the file at the end? I know I can use strrchr() for a period to get the pointer to the period just before file type. Is there a build in string function that will just take the rest of the string from a certain point on forward in the string? I know it wouldn't be much work to make it myself, but I figured I would find out if it already existed before doing it.
Code:
The error is:
Code:
What I want to do is take input of ip4 as a string, convert it to an integer to add 1 to it, then reconvert it back to a string. Its not working.
My full code is:
Code:
I've been given a custom-made string class which handles string, wstring and bstr. It has a number of methods and assignment operators to convert to and from different types. The app I work on compiles happily in VS6 and VS2008, but when trying to compile in Redhat (version 4.1.1 in Redhat 5.0)
[code]....