Get a system wide value for storage space total in blocks
Unless you are on an old system V box, core files are bad. If this is production, you have REALLY serious issues if there are core files strewn everywhere. There is the file space issue, which is minor, but the fact that production code aborts is of major concern: security-wise, data integrity - example: partial transactions with corrupt data.
Hi,
In Linux how to find out what will be the stack size allocated for a process?
Actually i have to fork n number of processess, and will call exec. I will be execing an executable which is already multithreaded and each thread size is defined. My doubt is how to know if the size of the... (2 Replies)
I want to find out how many disk blocks are used by only data (and not metadata) by a file.
But as far as I can tell, if the file has holes, then there is no way to know this.
You can find out the logical size of the file (physical size + hole blocks).
You can get the physical size of the... (3 Replies)
Hi,
I want to know the command which can be used for finding the % of disk space occupied by files & sub-folders inside a given mount in Sun Solaris
For eg: I have /tmp/ folder when I sat df -k it will give the percentage of space used by /tmp/.
Say if I want to see how much % the files &... (2 Replies)
I have a dual core pc, I write a application with two child process.
I know I can add sched_get_cpu to know the process run on which core, but, it just when the sched_get_cpu is called, it will tell me the result, my quesion is how to know the child proceess spend how many times on one core. (2 Replies)
I want to extend this script.
This must also be able to show me that a port is already assigned to a service but not running now
there must be three different messages
port 8949 is open but not listening
port 8959 is open
port 8999 hasn't been assigned to any service.
I know that... (1 Reply)
Good afternoon! Im new at scripting and Im trying to write a script to
calculate total space, total used space and total free space in filesystem names matching a keyword (in this one we will use keyword virginia). Please dont be mean or harsh, like I said Im new and trying my best. Scripting... (4 Replies)
Hello,
I am using Red Hat linux system. I see my /work directory has used space 300GB. But there are so many sub directory under /work. I want to list each direcotry and under all subdirectory. But i want to know how much space occupied by each directory. What kind of command i can use to... (3 Replies)
I have long list of file wanna processed by a program:
data_1.txt
data_2.txt
data_3.txt
data_4.txt
data_5.txt
data_6.txt
data_7.txt
data_8.txt
.
.
data_1_2.txt
data_2_2.txt
data_3_2.txt
data_4_2.txt
data_5_2.txt
data_6_2.txt
. (12 Replies)
Hi,
I run Fedora 17.
I created a physical volume of 30GB on a disk with 60GB of space so there is 30GB of free space. On the physical volume, I created my volume group and logical volumes. I assigned all the space in the physical volume to my volume group. I need to add the 30GB of free space... (1 Reply)
Discussion started by: mojoman
1 Replies
LEARN ABOUT ULTRIX
savecore
savecore(8) System Manager's Manual savecore(8)Name
savecore - save a core dump of the operating system
Syntax
/etc/savecore [ options ] dirname [ system ] [ corename ]
Description
The command is meant to be called near the end of the file. The command saves the core dump of the system (assuming one was made) and
writes a reboot message in the shutdown log.
The command checks the core dump to be certain it corresponds with the current running ULTRIX. If it does, it saves the core image in the
file dirname/vmcore.n and saves the namelist in the file dirname/vmunix.n. The trailing .n in the pathnames is replaced by a number which
increments each time is run in that directory.
After saving the core and namelist images, will save the error logger buffer into a predetermined file. The error logger buffer contains
information about why the crash occurred. After completes, the daemon will extract the error logger file and translate its contents into a
form familiar to the program.
Before writes out a core image, it reads a number from the file dirname/minfree. If there are fewer free blocks on the filesystem that
contains dirname than the number obtained from the file, a core dump is not done. If the file does not exist, savecore always writes out
the core file (assuming that a core dump was taken).
The command also writes a reboot message in the shut down log. If the system crashed as a result of a panic, also records the panic string
in the shut down log.
For partial crash dumps, creates a sparse core image file in dirname/vmcore.n. If this sparse core image file is copied or moved to
another location, the file expands to its true size which can take too much file system space. Hence, to copy or move sparse core image
files, you must use the command. The command has a conversion option to create sparse output files.
Options-c Clears the core dump. This option is useful when the core dump is corrupted in a way that will not allow to save it safely. Use the
option with caution, because once it clears the core dump, the core dump cannot be retrieved.
-d dumpdev dumplo
Specifies the dump device and the dump offset when running on a system image other than the currently running system image. The pro-
gram assumes that the running system image is and it reads the dump device and dump device offset are different in the system image
that crashed, the option provides the correct dump device and dump device offset.
-e Saves only the error logger buffer into a file. If used, core or namelist images are not saved.
-f corename
Takes the i corefile name as the file from which to extract the the crash dump data instead of the default dump device. This option
is used only for diskless workstations.
If the core dump was from a system other than /vmunix, the name of that system must be supplied as system. The program assumes that the
running image is
After successful completion, the core dump is cleared. Also, a message is written in the file which tells whether the dump succeeded or
failed.
Files
Shut down log
Current running ULTRIX system
See Alsodd(1), uerf(8)savecore(8)