Oracle procedure create files on UNIX folder on a regular basis. I need to FTP files onto windows server and place the files, based on their name, in the corresponding folders. File name is as follows: ccyymmddfoldernamefile.txt; Folder Name length could be of any size; however, the prefix and... (3 Replies)
Hi All,
Is there is a way to do this in a single unix command
I have unzipped some files into a directory ..
I want to check the count of the files in the directory and also i need to check whether the files is having read permision or not.. I know it can be done by a script isthere... (4 Replies)
Hi all this is a UNIX question.
I have a large flat file with millions of records.
col1|col2|col3
1|a|b
2|c|d
3|e|f
3|g|h
footer****
I am supposed to calculate the sum of col1 1+2+3+3=9, count of col1 1,2,3,3=4, and distinct count of col1 1,2,3=c3
I would like it if you avoid... (4 Replies)
This is the file structure:
DESKTOP/Root of Photo Folders/Folder1qweqwasdfsd/*jpg
DESKTOP/Root of Photo Folders/Folder2asdasdasd/*jpg
DESKTOP/Root of Photo Folders/Folder3asdadfhgasdf/*jpg
DESKTOP/Root of Photo Folders/Folder4qwetwdfsdfg/*jpg
DESKTOP/Root of Photo... (4 Replies)
Hi all,
I have 4 files for example named
abc01012009.txt
abc02012009.txt
abc03012009.txt
abc04012009.txt
in a folder. I would like to firstly backup the latest file available, in this case, the latest date available, abc04012009.txt to its subfolder named backup, and then rename the... (4 Replies)
First of all, the extent of my unix knowledge is next to nil. I've been able to telnet to a unix box, and thanks to the Computer Hope website, I've been able to learn a few basic commands to navigate from folder to folder, and view contents.
What I really need to do is obtain a count of all... (2 Replies)
Hi, been searching Google for like an hour and I doubt I got the right keywords so might as well ask here.
What I need:
Before:
Article1.txt 564
Article2.txt 799
Article3.txt 349
Article4.txt 452
* Separate files over 400 wordcount *
After:
Article1.txt 564... (3 Replies)
Hi all,
let me explain my requirments
i am having 5 folder with different name for eg) abc , cdf , efd, rtg, ead
each 5 folders contain 15 files
i want to move 10 files to some other folder, remain 5 files should be there in the same folder.
give me some suggestion on this. (6 Replies)
Hi All,
I need to delete the oldest file in folder when the file count in the folder exceed 6 ( i have a process that puts the source files into this folder )
E.x : Folder : /data/opt/backup
01/01/2012 a.txt
01/02/2012 b.txt
... (1 Reply)
So I'm trying to search for the top 10 or 15 items under a directory by file type. I want to run a command on a directory and get something like the following:
Example of expected output.. .PDF: 100, .txt: 95, .word: 80..
What would be the best way of going about this? I've searched around... (2 Replies)
Discussion started by: shackle101
2 Replies
LEARN ABOUT SUSE
fifo
FIFO(7) Linux Programmer's Manual FIFO(7)NAME
fifo - first-in first-out special file, named pipe
DESCRIPTION
A FIFO special file (a named pipe) is similar to a pipe, except that it is accessed as part of the file system. It can be opened by multi-
ple processes for reading or writing. When processes are exchanging data via the FIFO, the kernel passes all data internally without writ-
ing it to the file system. Thus, the FIFO special file has no contents on the file system; the file system entry merely serves as a refer-
ence point so that processes can access the pipe using a name in the file system.
The kernel maintains exactly one pipe object for each FIFO special file that is opened by at least one process. The FIFO must be opened on
both ends (reading and writing) before data can be passed. Normally, opening the FIFO blocks until the other end is opened also.
A process can open a FIFO in nonblocking mode. In this case, opening for read only will succeed even if no-one has opened on the write
side yet, opening for write only will fail with ENXIO (no such device or address) unless the other end has already been opened.
Under Linux, opening a FIFO for read and write will succeed both in blocking and nonblocking mode. POSIX leaves this behavior undefined.
This can be used to open a FIFO for writing while there are no readers available. A process that uses both ends of the connection in order
to communicate with itself should be very careful to avoid deadlocks.
NOTES
When a process tries to write to a FIFO that is not opened for read on the other side, the process is sent a SIGPIPE signal.
FIFO special files can be created by mkfifo(3), and are indicated by ls -l with the file type 'p'.
SEE ALSO mkfifo(1), open(2), pipe(2), sigaction(2), signal(2), socketpair(2), mkfifo(3), pipe(7)COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2008-12-03 FIFO(7)