✎ commandline - Etherboot/gPXE Wiki

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=====Etherboot command-line=====
====Network Interfaces====
Etherboot names interfaces following the pattern "net#".

**ifstat [interfaces...]** Displays information and statistics about the specified interface.  If no interface is specified, displays information about all detected interfaces.  Information includes MAC address, PCI bus/slot/function identiers, and packet counts.

**ifopen [interfaces...]** Opens the specified interfaces.  If no interface is specified, opens all interfaces.

**ifclose [interfaces...]** Closes the specified interfaces.  If no interface is specified, closes all interfaces.

**dhcp <interface>**  Attempts to configure the specified network interface using DHCP.  Also opens the interface.

====Working with images====
**imgfetch [-n|--name <image name>] <filename> [arguments...]** Retrieves an image file, giving it a specified name, and prepares it to be executed with the specified arguments.  File name may be a simple path, or an HTTP URL.  Simple paths are assumed to be located on the TFTP server specified by dhcp or **config**.  If //image name// is not specified, the base filename will be used as the name.

**module [-n|--name <image name>] <filename> [arguments...]** Equivalent to **imgfetch**

**initrd [-n|--name <image name>] <filename> [arguments]** Equivalent to **imgfetch**

**imgargs <image name>**  Set or change the arguments for the specified image name.

**imgload <image name>** Prepares an executable image to be executed.

**imgfree** Remove all fetched/loaded images.

**kernel [-n|--name <image name>] <filename> [arguments]** Fetch and load a bzImage format Linux kernel.  Equivalent to an imgfetch followed by imgload.

====Runtime configuration====
**config [scope]**  Enter a GUI to set up runtime configuration.  On some systems (cards) this may be stored in NVRAM.  //Scope// allows setting up options within a specific context.  Known scopes:
  * **proxydhcp** Settings from a Proxy DHCP server (Needs more description)
  * **[interface]** e.g. //net0//.  Set up a specific network device
  * **[interface].dhcp**.  Over-ride settings from the DHCP server
  * **[interface].nvo**.  Read/write settings in NVRAM on certain supported cards.  **//WARNING//** this permanently modifies settings on your network card.  As such there is some risk involved.  It is possible to **LOSE** data with this, particularly the MAC address.
  * **smbios**.  Read-only access to settings in the System Management BIOS (see below)

**set <identifier> <value>** Set the value of //identifier// to //value//.  

**show <identifier>** Display the value of //identifier//

**clear <identifier>**  Clear the value of //identifier//
===Identifiers===
Where there is correspondence between the gPXE option and a DHCP option, options specified by the DHCP server will be pre-filled.

Identifiers follow the format [scope]/identifier.  For example, to set the IP address of the 'net0' card use //set net0/ip XXX.XXX.XXX.XXX//

**uuid** The system's UUID

**hostname** The system's hostname.  Sent to the DHCP server for dynamic DNS changes, or specified by the DHCP server.  Equivalent to DHCP option 12 (host name)

**filename** The boot image to be loaded.  Equivalent to DHCP option 67 (Bootfile name)

**root-path** NFS/iSCSI root path.  The path to a network root filesystem.  Equivalent to DHCP option 17 (Root Path)

**username** Username to be used for any authentication.  Currently only used by iSCSI.

**password** Password to be used for any authentication.  Currently only used by iSCSI.  Intended to be stored in card NVRAM, but see warning above.

**priority**

**ip** The system's IPv4 address

**netmask** The system's IPv4 subnet mask

**gateway** The system's default gateway

**mac** The system's MAC address

**dhcp-server** The dhcp server from which settings were obtained

**dns-server** The DNS server to use for resolving hostnames

**next-server** The (TFTP) server from which to obtain files when not specifying an HTTP URL

**initiator_iqn_setting** The iSCSI initiator name
===SMBIOS===
Read-only access to the system's Systems Management BIOS.  Identifiers follow the format <type>.<offset>.<length>:<format>.  Example: To read the Manufacturer name, //get smbios/1.4.0:string// will read SMBIOS offset 4 as a string.  Valid formats: string, ipv4, int8, int16, int32, uint8, uint16, uint32, hex, uuid

====Other====
**autoboot** Attempts to boot the system

**exit** Exits gPXE, and passes boot control back to the BIOS.

**sanboot** Attempts to boot the system from a SAN device.

====Outstanding questions====
  * What does autoboot do?  Does it simply execute a script, pre-defined at compile time?  Does it follow its own sequence of boot operations?
  * When multiple images of the same name are fetched, which one will takes precedence?
  * What does the  **initrd** command do that's special?  It obviously sets the image type to initrd, but what's the effect of that?  Is there a way to specify the type of a loaded image after the fact?
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