1. UNIX for Dummies Questions & Answers

Hi All,:) In my application malloc is returning NULL even though there is sufficient amount of free memory available but the swap memory is low. Is this possible that, if free memory is high & swap memory is low, malloc will not be able to allocate memory & return NULL ? Few details: ... (4 Replies)

2. Shell Programming and Scripting

on the file Ftp'd from the mainframe ,do we have any UNIX command to replace mainframe low and values to space or null. i tried using tr and it doesn't work ... Thanks (1 Reply)

3. Shell Programming and Scripting

Is it possible to have a bash script pick the highest and lowest values of four variables? I've been googling for this but haven't come up with anything. I have a script that assigns variables ($c0, $c1, $c2, and $c3) based on the coretemps from grep/sed statements of sensors. I'd like to also... (5 Replies)

4. Shell Programming and Scripting

Hi guys, i have a question about spliting a binary file into 2 chunks. First chunk with all high bytes and the second one with all low bytes. What unix tools can i use? And how can this be performed? I looked in manpages of split and dd but this does not help. Thanks (2 Replies)

5. UNIX for Dummies Questions & Answers

Need some clarification on this.... 1. how are kernel/ user spaces and high/low memory related? 2. What do they all mean when i have the kernel command line as: "console=ttyS0,115200 root=/dev/sda2 rw mem=exactmap memmap=1M@0 memmap=96M@1M irqpoll" or 2. what do mem and memmap mean in... (3 Replies)

6. UNIX for Advanced & Expert Users

OS : Solaris 10 When I try to get the "echo" service port, getservbyname is returning null. I checked - /etc/services having an entry for echo - echo 7/tcp (But still getservbyname returning null) Any other config required to consider? (1 Reply)

7. AIX

Hello All I have a system running AIX 61 shared uncapped partition (with 11 physical processors, 24 Virtual 72GB of Memory) . The output from NMON, vmstat show a high run queue (60+) for continous periods of time intervals, but NO paging, relatively low I/o (6000) , CPU % is 40, Low network.... (9 Replies)

8. Red Hat

Hi team I have three physical servers running on Red Hat Enterprise Linux Server release 6.2 with the following memory conditions: # cat /proc/meminfo | grep -i mem MemTotal: 8062888 kB MemFree: 184540 kB Shmem: 516 kB and the following swap conditions: ... (6 Replies)

9. Programming

Hi All, I am using malloc function for allocating dynamic memory. When I am using below code on Linux server its working fine, but When I am trying the same code on HP UNIX server its returning NULL. below is a fragment of code in which it is giving problem. tmp = (format_tree... (4 Replies)

10. Shell Programming and Scripting

Hi all, i have a binary file splitted into 2 chunks, first part with all high bytes and the second part with all low bytes. I need to combine the two chunks into one binary file like (eg. exactly the reverse of the splitting method solved in the thread # 130940) Hi bytes file content:... (7 Replies)