Maven

Command line options

`-h` `--help`	Display help information
`-P` `--activate-profiles <profiles>`	Comma-delimited list of profiles to activate
`-V` `--show-version`	Display version information without stopping build
`-v` `--version`	Display version information and terminate the Maven process
`-o` `--offline`	Work offline
`-f <file>` `--file <file>`	Alternate path for POM file
`-s <file>` `--settings <file>`	Alternate path for the user settings file
`-gs <file>` `--global-settings <file>`	Alternate path for the global settings file
`-emp` `--encrypt-master-password <password>`	Encrypt master security password
`-ep` `--encrypt-password <password>`	Encrypt server password
`-fae` `--fail-at-end`	Only fail the build afterwards; allow all non-impacted builds to continue
`-ff` `--fail-fast`	Stop at first failure in reactorised builds
`-fn` `--fail-never`	Never fail the build, regardless of project result
`-e` `--errors`	Produce execution error messages
`-X` `--debug`	Produce execution debug output
`-q` `--quiet`	Quiet output - only show errors
`-B` `--batch-mode`	Run in non-interactive (batch) mode
`-C` `--strict-checksums`	Fail the build if checksums don’t match
`-c` `--lax-checksums`	Warn if checksums don’t match
`-U` `--update-snapshots`	Forces a check for updated releases and snapshots on remote repositories
`-N` `--non-recursive`	Prevents Maven from building submodules. Only builds the project contained in the current directory.

Skip tests in install or package phase:

mvn clean install -Dmaven.test.skip=true

mvn clean package -Dmaven.test.skip=true
Compile the test sources and copy their resources, but skip their execution:

mvn clean install -DskipTests

mvn clean package -DskipTests
Use ${env.VARIABLE_NAME} to get the value of an environment variable.
Display where is the Maven local repository:

mvn help:evaluate -Dexpression=settings.localRepository

The repository can be defined in the settings.xml file with the <localRepository>/path/to/local/repo</localRepository> element.
Execute some given test classes / test methods

mvn test -Dtest="TanTest,SinTest#checkValue"
Execute some given test classes / test methods

mvn test -Dtest="TanTest,SinTest#checkValue"
The -Dvalue=name parameters are set as system properties and can be retrieve in the Java code using java system.getproperty().

Maven daemon