sfdx force:apex:log:tail

Options

Name	Description
`--json`	Format output as json
`--loglevel <loglevel>`	Logging level for this command invocation
`-u, --targetusername <targetusername>`	Username or alias for the target org; overrides default target org
`--apiversion <apiversion>`	Override the api version used for api requests made by this command
`-c, --color`	Colorize noteworthy log lines
`-d, --debuglevel <debuglevel>`	Debug level for trace flag
`-s, --skiptraceflag`	Skip trace flag setup