Unset - Cisco Catalyst 2950 Command Reference Manual

Appendix B Catalyst 2950 and 2955 Switch Boot Loader Commands
Usage Guidelines Environment variables are case sensitive and must be entered as documented.
Environment variables are stored in files as shown in
Table B-3
Environment Variable
BAUD, ENABLE_BREAK, CONFIG_BUFSIZE,
CONFIG_FILE, MANUAL_BOOT, PS1
BOOT, BOOTHLPR, HELPER, HELPER_CONFIG_FILE
The MANUAL_BOOT environment variable can also be set by using the boot manual global
configuration command.
The BOOT environment variable can also be set by using the boot system filesystem:/file-url global
configuration command.
The ENABLE_BREAK environment variable can also be set by using the boot enable-break global
configuration command.
The HELPER environment variable can also be set by using the boot helper filesystem:/file-url global
configuration command.
The CONFIG_FILE environment variable can also be set by using the boot config-file flash:/file-url
global configuration command.
The CONFIG_BUFSIZE environment variable can also be set by using the boot buffersize size global
configuration command.
The BOOTHLPR environment variable can also be set by using the boot boothlpr filesystem:/file-url
global configuration command.
The HELPER_CONFIG_FILE environment variable can also be set by using the boot helper-config-file
filesystem:/file-url global configuration command.
The PASSWD_RECOVERY environment variable can be set or reset by using the configuration CLI
service password-recovery command.
The boot loader prompt string (PS1) can be up to 120 printable characters except the equal sign (=).
Examples This example shows how to change the boot loader prompt:
switch: set PS1 loader:
loader:
You can verify your setting by using the set boot loader command.
Related Commands Command

unset

OL-10102-01
Environment Variables Storage Location
Description
Resets one or more environment variables to its previous setting.
Table B-3.
Location (file system:filename)
flash:env_vars
flash:system_env_vars
Catalyst 2950 and Catalyst 2955 Switch Command Reference
set
B-23