I am trying to merge two large file horizontally using paste command. Every thing is working fine except for time. Its taking lot of time.
Is there any effiecient way of doing the same thing or is there anyway by which I can improve its perfomance programatically?
Thanks,
Yeheya (1 Reply)
This is likely to be a dumb one.
How can I use sed to substitute string occurances having it read from an input file and write to this very same file ?
I have a file with lots of occurances of '2006', I want to change it to '2007', but I'd like these changes to be saved on the input file.
... (5 Replies)
Hi Every body,
I have file which has enttries, with each 5 entries as a set of entries, I would like to read the file (line by line) and print five entries of a set vertically, the next entry should come in the next line.
Example:
cat sample_file
I am a
Unix Adminsitrator
new to shell... (6 Replies)
Hi,
This is the first time playing around with perl and need some help.
Assuming if i have a line of text that looks like this:
Date/Time=Nov 18 17:12:11;Device Name=192.168.1.1;Device IP=192.168.1.1;Device Class=IDS;Source IP=155.212.212.111;Source Name=UNKNOWN;Source Port=1679... (3 Replies)
Hi, I hope the title does not scare people to look into this thread but it describes roughly what I'm trying to do. I need a solution in PHP.
I'm a programming beginner, so it might be that the approach to solve this, might be easier to solve with an other approach of someone else, so if you... (0 Replies)
Hi All,
I am having an XML tag like:
<detail sim_ser_no_1="898407109001000090"
imsi_1="452070001000090">
<security>ADM1=????</security>
<security>PIN1=????</security>
<security>PIN2=????</security>
... (2 Replies)
Hi
What is the syntax for if statement using && and || operator?
if && ] ||
here its giving me an error to this if statement
any suggestion?? (2 Replies)
I have got an Perl array like:
@array = (1,2,3,4,5,6,1,2,3,4,1,2,1,2,3,4,5,6,7,8,9...............)
This numeric sequence will be always sequentially increasing, unless it encounters, The beginning of the new sequentially increasing numeric sequence.
SO in this array we get sequentially... (5 Replies)
I have 1 file that has elements as follows. Also the CVR(10) and the word "SAUCE" only appear once in the file so maybe a grep command would work?
file1
CVR( 9) = 0.385E+05, ! VEHICLE
CVR(10) = 0.246E+05, ! SAUCE
CVR(11) = 0.162E+03, ! VEHICLE
I need to extract the... (6 Replies)
I am a scripting noob, and having much trouble getting this script to run correctly. Upon start it should read the home directory and sort the files into a text file. Then have user enter a user name and insert it into line 1 of the same text file. Then have the date insert into the second line of... (8 Replies)
Discussion started by: bbaumg02
8 Replies
LEARN ABOUT DEBIAN
oss_audioloop
oss_audioloop(7) OSS Devices oss_audioloop(7)NAME
oss_audioloop - Loopback audio driver.
DESCRIPTION
The loopback audio driver makes it possible to create special purpose virtual audio devices based on user land server processes.
Loopback devices are driven by a timer interrupt and no real audio hardware is required.
INTRODUCTION
Audio loopback devices are like named pipes or pseudo terminals. They are grouped in client and server device pairs. The server side device
must be open before the client side device can be opened.
Loopback devices are typically used to implement server based special purpose audio devices. This kind of server can for example transfer
the audio data played by the client application to some remote system using some VoIP protocol. However the server application doesn't need
to be any dedicated server. Practically any audio application can be used as the server.
SERVER SIDE DEVICE
The server side applications sets up the native sampling rate and sample format (number of bits and channels). The server side device can
be opened for input (O_RDONLY) pr output (O_WRONLY). Opening for simultaneous input and output (O_RDWR) is not permitted.
The server application will automatically be paused at the moment it tries to read or write audio data for the first time. It will be kept
in sleep until the client side application starts writing or reading data. This sleep period may last forever and in some cases the first
write/read call never returns. For this reason it's not recommended to use GUI based audio applications as the server. Note that this wait
will occur even in the non-blocking (O_NONBLOCK) mode (this is intentional feature and not a bug).
CLIENT SIDE DEVICE
The client side device is typically used by any ordinary audio application. There is nothing special in loopback devices.
Since the loop is unidirectional the client side will be forced to be write only if the server side device is open for recording and vice
versa.
The loop will use the sample rate and sample format (number of bits and channels) set by the server side application. If the client uses
different settings then OSS will perform the required sampling rate and format conversions automatically.
COMPATIBILITY ISSUES
Audio loopback devices differ from "normal" audio devices because an application is needed at the both ends of the loop. The loop device
will return a "Connection reset by peer" error (ECONNRESET) error. Applications designed to be used as loopback based server applications
can/should use this error (returned by read or write) as an end-of-stream indication.
OPTIONS
o audioloop_instances:
Specifies how many loopback client/server audio device pairs to be created.
Values: 1-16
Default: 1
KNOWN PROBLEMS
o There is no mixer (volume control) related with loopback audio devices. This may prevent poorly designed audio applications (that
expect/require a mixer) from working. There is no workaround available.
o The server side application will wait until the client side application starts using it. This wait may last forever which in turn may
cause unrecoverable (network) problems with some applications.
o Loopback devices may return "Connection reset by peer" error when the reote side of the loop disconnects the device. Some recording
applications may fail to save the recorded data properly because of this. Use some other application (such as ossrecord) if this hap-
pens.
FILES
/etc/oss4/conf/oss_audioloop.conf Device configuration file
AUTHOR
4Front Technologies
16 December 2012 oss_audioloop(7)