savecore(8) -- Linux man page

 

NAME

savecore - save a diskdump image.  

SYNOPSIS

savecore [ -D ] [ -f ] [ -p ] [ -P flags ] [ -v ] device
savecore -V
 

DESCRIPTION

savecore reads data from the disk dump partition specified by the device argument, and creates a vmcore file in a directory named /var/crash/127.0.0.1- timestamp. The timestamp portion of the directory name indicates the date and time when system crash occurred. The vmcore file can be analyzed by the crash(8) utility. savecore returns 1 if it fails due to an error. Otherwise it returns 0.  

OPTIONS

-D
Delete dump from the dump partition after saved.
-f
Create a vmcore file forcibly even if dump directory exists.
-p
Display progress for creating a vmcore file.
-P flags
Specify the value of page flags. If the some flags of page have been matched with the specified value, the page is saved in vmcore with uncompressed data. This option is effective only when dump compression is used.
-v
Provide some verbose outputs.
-V
Show version information and exit.

 

FILES

/var/crash
The main directory where the crash dump files are stored. Each dump is put in a subdirectory whose name consists of the concatenation of "127.0.0.1" and the date and time of the crash.
/var/crash/scripts
This directory can contain scripts that are run at various times. They all get passed the ip of 127.0.0.1 as the first argument, and each one gets the directory that the dumpfile is written to as the second argument.

diskdump-nospace - This is run when there is not enough disk space for the dump of the crashed machine. If this script exits with a non-zero return value, savecore will try once again (but only once) before giving up on the dump. If this script exits with a zero return value, savecore will exit without performing a dump. The default script simply sends a mail message and exits with a zero value, but it can be enhanced to try to free up diskspace and return a non-zero value.

 

SEE ALSO

diskdumpctl_proc(8), diskdumpctl_sysfs(8), diskdumpfmt(8), crash(8)