ArgumentsCheck check arguments count correctness.

clear screen.

compress string by regexp trim space or tab.

错误断言.

Execute executes shell commands with arguments.

GetNodeIP fetches node ip via command hostname.

GetOSName gets data in /etc/os-release and gets OS name.

GetUsername return current username.

check directory is or is not empty.

IsNumeric is_numeric() Numeric strings consist of optional sign, any number of digits, optional decimal part and optional exponential part.

return relative file path if filepath is absolute.

ParseConnect parse connect string, format is [user@]host[:port].

return the original file path if file is a symbol link.

return absolute file path if filepath is relative.

check file is or is not exist.

Query values contains keys.

SortKeys sort map keys.

CheckSymbol is the code for check symbol.

CrossSymbol is the code for check symbol.

Message type.