I am not able to understand below line in unix bash shell.Could anyone explain what it will do
path1 is defined and it is a directory path
var1 is defined and it holds string value like abc
var2 is defined and it holds string value like cde
Basically i did not understand the importance of /* and * .I have highlight in bolt
Last edited by Corona688; 11-17-2014 at 11:54 AM..
Couple of questions as I try to decipher someones code who left...
What would something coded like this do?
IFS=:
grep FIELD1 /Path/Path2/Param.fle | read LBL1 LBL2 USRID EADR SUBJ SERVERNAME CFGTBL DIR
ERR=0
Param.fle contents..
FIELD1:FEI::FIELD2:dATAFIELD BATCH:MAIN SERVER......etc.. (2 Replies)
Can any body explains the under given lines of code i have difficulties in understanding it,
my $errorlog = "/var/log/controler.log";
&initLanguage($language);
&launchCbox();
sub launchCbox { ... (1 Reply)
I am really new to UNIX and programming in general and so apologies if this thread is a bit simple.
I have searched and found a piece of sample code for a training program I am currently undertaking, but seeing as I am relatively new, I dont completely understand how it works.
Here is the... (1 Reply)
hello all,
May i know what is this "DEBUG_ME $DEBUG_CMD main" doing in the below code. I am confused with alias also "alias DEBUG_ME='#'". Thanks for your help.
set -x
alias DEBUG_ME='#'
if ; then
. /product/apps/informatica/v7/pc/ExtProc/debug.ksh "$1"
fi
# Declaring the... (1 Reply)
This is the command. Assume file1 exists but file2 does not:
ls file1 file2 >newfile 2>&1
This simply makes a text file with two lines: file1 \n file2 could not be found. What I don't understand is that when you run this command: ls file1 file2 >newfile, it prints "file2 could not be found" to... (1 Reply)
Well, I found myself trying to fix some Perl code (Ive never done any Perl in my life) and I pinpointed the place where the bug could be. But to be sure I have to know what does a few line of code mean:
$files_lim =~ (/^\d*$/)
$files_lim =~ (/^\d*h$/)$files_age =~ s/h//The code where this was... (0 Replies)
What is the difference between the two statements below?
A:
$a->{"$fruit"}->{"$color"}->{size} = $size
B:
$size = $a->{"$fruit"}->{"$color"}->{size}
Please assist. Thanks! (0 Replies)
Hi,
I need to understand below perl code, can some one advise me.
perl -MDate::Parse -e'BEGIN{$main::now=time;$main::old=(time-60*30)}' -nE'if(/^(\w+\s+\d+\s+\d+:\d+:\d+)/) {$t=str2time $1; $t > $old && $t < $now && print}' (1 Reply)
As the title suggests, I want to better understand the following assembly code:
section .text
global main ; must be declared for linker (gcc)
main: ; tell linker entry point
mov edx, len ; message length
mov ecx, msg ; message to write... (2 Replies)
Hello... and thanks in advance for reading this or offering me any assistance
I'm trying to understand specific differences between the various login scripts... I understand the differences between interactive vs non-interactive and login vs non-login shells... and that's not where my question... (4 Replies)
Discussion started by: bodisha
4 Replies
LEARN ABOUT DEBIAN
mstack
VIEW-OS(1) General Commands Manual VIEW-OS(1)NAME
mstack - networking stack selection
SYNOPSIS
mstack [-hv] [-o protocol list] stack_mountpoint command
DESCRIPTION
In View-OS multiple networking stacks are available to processes at the same time. View-OS supports the msocket(2) system call. mstack
defines the default stack (for each address family) that is used when msocket refers to a NULL pathname for its stack. mstack provides
also a backward compatibility for all the programs using the obsolete socket(2) system call. The stack mountpoint identifies the stack. In
ViewOS it is the mountpoint where the stack was mounted (by mount(2)(8). In fact the call:
"socket(domain,type,protocol)"
is equivalent to:
"msocket(NULL,domain,type protocol)"
mstacks changes the default stack for the desired protocol families and executes the command (by execve(2)).
OPTIONS -h prints the mstack command usage
-v sets the verbose mode on
-o defines the list of protocols. Without a -o option, mstack redefines the default stack for all protocols families. The list of proto-
cols may include the a comma separated sequence of the following items: all, unix (or simply u), ipv4 (4), ipv6 (6), netlink (n),
packet (p), bluetooth (b), irda (i), ip (which include all ip related protocols ipv4, ipv6, netlink and packet), #n where n is the num-
ber of protocol. Each item can be prefixed by + or - to specify whether the protocol/group of protocols must be added or removed from
the set.
EXAMPLES
mstack /dev/net/lwip ip addr
lists the address managed by the stack mounted on /dev/net/lwip.
exec mstack /dev/net/null bash
disables the standard stack in a new bash (which overcomes the current one).
mstack -o ip /dev/net/lwip bash
starts a new bash which uses the stack /dev/net/lwip for ipv4 and ipv6 but not for the other protocols.
mstack -o -unix /dev/net/lwip bash
starts a new bash which uses the stack /dev/net/lwip for all protocols but AF_UNIX.
mstack -o +ip,-ipv6 /dev/net/lwip bash
starts a new bash which uses the stack /dev/net/lwip for ipv4, netlink, packet but not ipv6.
SEE ALSO umview(1), kmview(1), msocket(3), umnetnative(9), umnetnull(9), umnetlwipv6(9), unix(7), ip(7), ipv6(7), netlink(7), packet(7).
AUTHORS
View-OS is a project of the Computer Science Department, University of Bologna. Project Leader: Renzo Davoli.
<http://www.sourceforge.net/projects/view-os>
Howto's and further information can be found on the project wiki <wiki.virtualsquare.org>.
VIEW-OS: a process with a view April 23, 2008 VIEW-OS(1)