I'm not used to using "sed", but I need to use it to extract part of a string piped to it.
However, the "1" mentioned in the tutorials I read doesn't extract the token between the two brackets and returns the whole input string:
Code:
/tmp# echo "before [myfile.txt] after" | sed 's/[(.+)]/1/' before [myfile.txt] after
I expected simply "myfile.txt".
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.
I've a string "this.is.a.name", and I would like to return "is.a.name". How can I do that in bash?
View 3 Replies View RelatedI would like to return the last part of a string in an array of strings in bash.
The array contains in each position the content below:
Code:
a.b.c
a.d.f
a
a.d
[Code].....
I have a macro which I use with ROOT. In this macro I want to check if a part of string exist so I can ignore it inside a loop. So, inside a loop I want to have something like:
Code:
if (string == "pre_ti_data_bdt*" || string == "pre_ti_data_nn*")
continue;
but of course I cannot use * in this piece of code! How to do this trick in C++?
In a file,
I need to remove a part of string: /o
string:
or
the string can be
here I need to remove /d2
So, I need to remove everything after when I get last /
copy string a to string b and change string b with toupper() and count the chars
View 3 Replies View RelatedI just used dd to clone a linux partition to a new hard drive, it had 800mb left on the old hard drive, after dd, new hard drive lists 1.29/1.3 terabytes full. Is this what happens by default in dd? How can I fix this?
View 1 Replies View RelatedI'm trying to figure out how to access the local part and the domain part of an email address in postfix's main.cf. For example, myname@mydomain.net has myname as the local part and mydomain.net as the domain part.I get the whole email address with %s. I want to speed up the lookups by writing better database queries.I've had no luck finding this in the otherwise well documented postfix.
View 2 Replies View Relatedwe have access to one domain name , 1 internet ip address and may servers hosting different part of site. I want them all to be accessed via same web site . some of the server in our network are embedded devices.they have their specific utility being hosted on that machine. So the severs are bound to be distributed . I just wanted to know how can I access them via single ip, domain name.
View 6 Replies View RelatedIn bootseqence of linux, the first step is check the CMOSRAM(size 64bytes) setup for custmor setting. So i am just confused wether CMOSRAM is a part of motherboard or is a part of RAM itself.
View 4 Replies View RelatedI'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?
I 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.
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 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'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]....
I have the following two type of strings1: A/D2: A/C/DI am trying to write a subroutine to check whether all of the letters in string 1 appears in string 2. If yes, return true. If not, return false. In the above example, all the letters (A and D) in string 1 are also present in string 2, so I return true.
View 4 Replies View Relatedi 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?
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]....
Do I have the convert the int to a string using stringstream then convert the string to a char? or is there a more direct way?Also is there a way to tell the length of a int?
View 5 Replies View RelatedI am unable to run firefox on my Hp mini 110 running FC14. This happened, I think, after an update that I have done.
When ever I run firefox I get the following messages.
Code:
I am using Fedora 14 (64 bit version): Can't Start XAWTV. Returns the error.
$ xawtv
This is xawtv-3.99.rc6, running on Linux/x86_64 (2.6.35.12-90.fc14.x86_64)
xinerama 0: 1920x1080+0+0
WARNING: No DGA direct video mode for this display.
WARNING: keeping fbuf pitch at: 7680, as no base addr was detected
WARNING: couldn't find framebuffer base address, try manual
configuration ("v4l-conf -a <addr>")
v4l2: WARNING: framebuffer base address mismatch
v4l2: me=(nil) v4l=(nil)
Warning: Missing charsets in String to FontSet conversion
Warning: Missing charsets in String to FontSet conversion
Oops: can't load any font
I have a service on my Suse 11 server which runs an ssh command (using openSSH) on another box.The output below is returned, but legitimate output is also returned as if the command had executed successfully. For example, the service executes an ls command through ssh, gets the error below, but also the contents of the remote directory as output. This is a problem because the service retries the command until it receives no error. I have been unable to replicate this manually from the command line. Does anyone know what might cause this or what this error really means?
View 5 Replies View Relatedcheck the following program
/*a.c*/
int main()
[code]....
10.10 starts absolutely fine and goes to login screen. I enter my password and then the screen goes blank and returns to the log in page.
I first suspected it was a problem with password recognition but if I enter a wrong password it flashes up with an error so it can't be that. Only started happening after a standard update last night.
Am now having to use my flatmates windows PC to send this message
