systemd-coredumpctl(1) [centos man page]
SYSTEMD-COREDUMPCTL(1) systemd-coredumpctl SYSTEMD-COREDUMPCTL(1) NAME
systemd-coredumpctl - Retrieve coredumps from the journal SYNOPSIS
systemd-coredumpctl [OPTIONS...] {COMMAND} [PID|COMM|EXE|MATCH...] DESCRIPTION
systemd-coredumpctl may be used to retrieve coredumps from systemd-journald(8). OPTIONS
The following options are understood: -h, --help Print a short help text and exit. --version Print a short version string and exit. -F, --field= Print all possible data values the specified field takes in matching coredump entries of the journal. -o, --output=FILE Write the core to FILE. --no-pager Do not pipe output of list into a pager. --no-legend Do not print the column headers. The following commands are understood: list List coredumps captured in the journal matching specified characteristics. dump Extract the last coredump matching specified characteristics. Coredump will be written on stdout, unless an output file is specified with -o/--output. gdb Invoke the GNU debugger on the last coredump matching specified characteristics. MATCHING
Match can be: PID Process ID of the process that dumped core. An integer. COMM Name of the executable (matches COREDUMP_COMM=). Must not contain slashes. EXE Path to the executable (matches COREDUMP_EXE=). Must contain at least one slash. MATCH General journalctl predicates (see journalctl(1)). Must contain an equals sign. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. Not finding any matching coredumps is treated as failure. SEE ALSO
systemd-journald.service(8), gdb(1) systemd 208 SYSTEMD-COREDUMPCTL(1)
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SYSTEMD-SYSCTL.SERVICE(8) systemd-sysctl.service SYSTEMD-SYSCTL.SERVICE(8) NAME
systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at boot SYNOPSIS
/lib/systemd/systemd-sysctl [OPTIONS...] [CONFIGFILE...] systemd-sysctl.service DESCRIPTION
systemd-sysctl.service is an early boot service that configures sysctl(8) kernel parameters by invoking /lib/systemd/systemd-sysctl. When invoked with no arguments, /lib/systemd/systemd-sysctl applies all directives from configuration files listed in sysctl.d(5). If one or more filenames are passed on the command line, only the directives in these files are applied. In addition, --prefix= option may be used to limit which sysctl settings are applied. See sysctl.d(5) for information about the configuration of sysctl settings. After sysctl configuration is changed on disk, it must be written to the files in /proc/sys before it takes effect. It is possible to update specific settings, or simply to reload all configuration, see Examples below. OPTIONS
--prefix= Only apply rules with the specified prefix. -h, --help Print a short help text and exit. --version Print a short version string and exit. EXAMPLES
Example 1. Reset all sysctl settings systemctl restart systemd-sysctl Example 2. View coredump handler configuration # sysctl kernel.core_pattern kernel.core_pattern = |/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I Example 3. Update coredump handler configuration # /lib/systemd/systemd-sysctl --prefix kernel.core_pattern This searches all the directories listed in sysctl.d(5) for configuration files and writes /proc/sys/kernel/core_pattern. Example 4. Update coredump handler configuration according to a specific file # /lib/systemd/systemd-sysctl 50-coredump.conf This applies all the settings found in 50-coredump.conf. Either /etc/sysctl.d/50-coredump.conf, or /run/sysctl.d/50-coredump.conf, or /usr/lib/sysctl.d/50-coredump.conf will be used, in the order of preference. See sysctl(8) for various ways to directly apply sysctl settings. SEE ALSO
systemd(1), sysctl.d(5), sysctl(8), systemd 237 SYSTEMD-SYSCTL.SERVICE(8)