KENV(1) | FreeBSD General Commands Manual | KENV(1) |
NAME
kenv — dump or modify the kernel environmentSYNOPSIS
kenv | [ -hNq] |
kenv | [ -qv] variable[ = value] |
kenv | [ -q] -u variable |
DESCRIPTION
The kenv utility will dump the kernel environment if invoked without arguments. If the -h option is specified, it will limit the report to kernel probe hints. If an optional variable name is specified, kenv will only report that value. If the -N option is specified, kenv will only display variable names and not their values. If the -u option is specified, kenv will delete the given environment variable. If the environment variable is followed by an optional value, kenv will set the environment variable to this value.If the -q option is set, warnings normally printed as a result of being unable to perform the requested operation will be suppressed.
If the -v option is set, the variable name will be printed out for the environment variable in addition to the value when kenv is executed with a variable name.
Variables can be added to the kernel environment using the /boot/loader.conf file, or also statically compiled into the kernel using the statement
env filename
in the kernel config file. The file can contain lines of the form
name = value # this is a comment
where whitespace around name and '=', and everything after a '#' character, are ignored. Almost any printable character except '=' is acceptable as part of a name. Quotes are optional and necessary only if the value contains whitespace.
HISTORY
The kenv utility appeared in FreeBSD 4.1.1.May 11, 2012 | FreeBSD |