Most lcrash commands have two things in common:
Command output can be piped to normal shell commands like less or grep.
They support the option -w to write output to a file.
To pipe the output of a command to less, just specify lcrash_command | less. Take care to use a blank before the pipe symbol, otherwise it could be misinterpreted by lcrash.
When using lcrash_command -w filename, lcrash appends the output of the executed command to the file filename.