9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Oracle Linux 5.6 64-bit (derivative of RHEL)
Dear Ann Landers,
This is about as bizarre as anything I've ever seen.
I have a little test script I've been working with. When I redirect stdout to a file, no file. Make a copy of the script to another name. Execute it and redirect stdout, and... (4 Replies)
Discussion started by: edstevens
4 Replies
2. UNIX for Advanced & Expert Users
Hi all.
I have a really really weird problem that I've been working on for days.
The problem manifested as users cannot connect to our web servers via SSH when they're using our wireless network. Here's where it gets weird:
- Clients from anywhere other than the wireless subnet can... (4 Replies)
Discussion started by: pileofrogs
4 Replies
3. Shell Programming and Scripting
I have a ksh script (dtksh Version M-12/28/93d on Solaris 10) that is run daily by cron and sometime hangs forever. I need to detect if there is an old copy hung before I start the new run, and if so send an email and exit the script. Here is part of the code:
#!/usr/dt/bin/dtksh... (4 Replies)
Discussion started by: 73rdUserID
4 Replies
4. IP Networking
A server I host is having very rare glitches where a file the user downloads will have incorrect contents. This almost never happens when I am looking, I caught it once and only once -- a user messaged me saying his antivirus had given him a warning about an image file downloaded from his... (2 Replies)
Discussion started by: Corona688
2 Replies
5. Shell Programming and Scripting
I have a process using the following series of sed commands that works pretty well.
sed -e 1,1d $file |sed 1i\\"EHLO Broadridge.com" |sed 2i\\"MAIL FROM:${eaddr}"|sed 3i\\"RCPT TO:${eaddr}"|sed 4i\\"DATA"|sed 5s/.FROM/FROM:/|sed 6s/.TO/TO:/|sed 7,7d|sed s/.ENDDATA/./|sed s/.ENDARRAY// >temp/$file... (1 Reply)
Discussion started by: njaiswal
1 Replies
6. Shell Programming and Scripting
Hello,
Do you have any tips on how to optimize the AWK that gets the lines in the log between these XML tags?
se2|6|<ns1:accountInfoRequest xmlns:ns1="http://www.123.com/123/
se2|6|etc2">
.... <some other tags>
se2|6|</ns1:acc
se2|6|ountInfoRequest>
The AWK I'm using to get this... (2 Replies)
Discussion started by: majormark
2 Replies
7. Programming
I'm trying to write a function which opens a file pointer and writes one of the function parameters into the file, however for some reason Im getting a core dump error.
The code is as below
void WriteToFile(char *file_name, char *data)
{
FILE *fptr;
/*disk_name_size is a... (10 Replies)
Discussion started by: JamesGoh
10 Replies
8. UNIX for Dummies Questions & Answers
Hi,
I have prepared script which is taking more time to process. find below script and help me with fast optimized script:-
cat name.txt | while read line
do
name=$(echo $line| awk '{print $8}')
MatchRecord=$(grep $name abc.txt | grep -v grep )
echo "$line | $MatchRecord" | awk... (2 Replies)
Discussion started by: aju_kup
2 Replies
9. UNIX for Advanced & Expert Users
I'm trying to use the while statement to increment a positive number, with a leading "0". when I pass it through, it seems to come out with a negative value, and all the increments remain negative.
This is what I have:
i=010986294184
j=010986988888
while ; do
echo $i
i=(($i + 1))
done... (8 Replies)
Discussion started by: Khoomfire
8 Replies
CHMEM(1) General Commands Manual CHMEM(1)
NAME
chmem - change memory allocation
SYNOPSIS
chmem [+] [-] [=] amount file
EXAMPLES
chmem =50000 a.out # Give a.out 50K of stack space
chmem -4000 a.out # Reduce the stack space by 4000 bytes
chmem +1000 file1 # Increase each stack by 1000 bytes
DESCRIPTION
When a program is loaded into memory, it is allocated enough memory for the text and data+bss segments, plus an area for the stack. Data
segment growth using malloc , brk , or sbrk eats up stack space from the low end. The amount of stack space to allocate is derived from a
field in the executable program's file header. If the combined stack and data segment growth exceeds the stack space allocated, the pro-
gram will be terminated.
It is therefore important to set the amount of stack space carefully. If too little is provided, the program may crash. If too much is
provided, memory will be wasted, and fewer programs will be able to fit in memory and run simultaneously. MINIX does not swap, so that
when memory is full, subsequent attempts to fork will fail. The compiler sets the stack space to the largest possible value (for the Intel
CPUs, 64K - text - data). For many programs, this value is far too large. Nonrecursive programs that do not call brk , sbrk , or malloc ,
and do not have any local arrays usually do not need more than 8K of stack space.
The chmem command changes the value of the header field that determines the stack allocation, and thus indirectly the total memory required
to run the program. The = option sets the stack size to a specific value; the + and - options increment and decrement the current value by
the indicated amount. The old and new stack sizes are printed.
SEE ALSO
install(1), brk(2).
CHMEM(1)
