Linux Metrics

This page lists the Linux guest metrics DMC collects and the exact commands it runs to collect them.

DMC collects only the data needed for cloud migration planning: no PII, no application-level data, and no unnecessary system details. All collected data can be reviewed locally before anything is uploaded. For the categories DMC never reads, see What DMC does not collect.

Captured Data Overview¶

Category	Details Captured
Performance Metrics	CPU, memory, disk and network usage. Lookback and sampling depend on the scan type; see Performance metric collection
Disk Metrics	Throughput, IOPS, Size, and Usage
Operating System	Distribution, version, kernel and architecture
Installed Software	Package inventory from dpkg, rpm and snap: name, version, publisher
Middleware Detection	Running Tomcat, JBoss, WebLogic and Oracle Database processes, identified from the process list
SQL Server Instances	SQL Server on Linux packages found through the package manager
Processes and Network Connections	Running processes with binary path and package, and active connections, for the dependency map
Error Diagnostics	DMC's own timestamped scan log with severity levels. This is not the operating system event log

Linux Guest Collector Command Inventory¶

Command	Purpose	Type	Access	Dependencies
awk/sed	Text processing of command outputs	System	Read	gawk, sed
bash	Script interpreter	System	Execute	Core system
basename	Extract filename from file path	System	Read	coreutils
cat	Read configuration files	System	Read	coreutils
cut	Extract fields from delimited text	System	Read	coreutils
date	Timestamp generation for logging	System	Read	coreutils
df	Report filesystem disk space usage	System	Read	coreutils
dmidecode	Read system DMI/SMBIOS information	System	Read	dmidecode
dpkg-query	Query DPKG-based package information	System	Read	dpkg
echo	Output text processing results	System	Write	coreutils
getconf	Get system configuration values	System	Read	libc-bin
grep	Pattern matching in output and files	System	Read	grep
head/tail	Extract portions of command output	System	Read	coreutils
hostname	Display system hostname	System	Read	hostname
ifconfig	Configure network interfaces	System	Read	net-tools
ip	Show/manipulate routing and network devices	System	Read	iproute2
lsblk	List block devices and partitions	System	Read	util-linux
lscpu	Display CPU architecture information	System	Read	util-linux
nproc	Print number of available processors	System	Read	coreutils
printf	Formatted output for logs and JSON	System	Write	coreutils
ps	Process inspection for middleware detection	System	Read	procps
rpm	Query RPM-based package information	System	Read	rpm
snap	Query snap package information	System	Read	snapd
tee	Write to logs while displaying output	System	Write	coreutils
touch	Create log files	System	Write	coreutils
tr	Translate text (i.e. upper to lower case)	System	Read	coreutils
uname	Detect system architecture	System	Read	coreutils

Linux Network Dependency Map Command Inventory¶

Command	Purpose	Type	Access	Dependencies
bash	Script interpreter	System	Execute	Core system
ps	Process listing for connection mapping	System	Read	procps
grep	Pattern matching in outputs	System	Read	grep
netstat/ss	Network connection discovery	System	Read	net-tools, iproute2
sha256sum	Process hash generation	System	Read	coreutils
awk	Process connection data parsing	System	Read	gawk
sed	JSON escaping and string processing	System	Read	sed
date	Timestamp generation for logging	System	Read	coreutils
ls	Process binary path discovery	System	Read	coreutils
dpkg/rpm	Package information lookup	System	Read	dpkg, rpm
which	Tool path resolution	System	Read	which
getcap	Check for capability-based privileges	System	Read	libcap-utils
sudo	Privilege escalation when needed	System	Execute	sudo
id	User privilege detection	System	Read	coreutils
touch	Create log and output files	System	Write	coreutils

Linux MS SQL Detection Command Inventory¶

Command	Purpose	Type	Access	Dependencies
bash	Script interpreter	System	Execute	Core system
rpm/dpkg-query	Query package management for SQL Server	System	Read	rpm, dpkg
date	Timestamp generation for logging	System	Read	coreutils
printf	Formatted output for logs and JSON	System	Write	coreutils
grep	Filter package management output	System	Read	grep
touch	Create log and output files	System	Write	coreutils
echo	Output SQL Server data to files	System	Write	coreutils
basename	Extract filename for logs	System	Read	coreutils