Terminal en ChromeOS “crosh”

Un día de trabajo con un ChromeBook puede ser un reto para aquellas personas que no están familiarizadas con temas de nubes y servicios de Internet, ya que estos dispositivos están fabricados para trabajar online.

Si ya tienes unos de estos equipos es bueno saber que cuentan con su consola (Terminal), esta se llama crosh, y para acceder a ella se debe presionar las teclas ctrl+alt+t teniendo abierto el navegador Chrome, nos debe de aparecer algo similar a esto.crosh_01

La forma de conseguir ayuda es con el comando help, que te presentará una salida así.crosh_03

También es importante mencionar que se puede utilizar ssh por medio de una extensión de Google Chrome (Link de la extensión) , y se ve de esta manera.
ssh_crosh_02
Basta con agregar los datos de conexión para poder acceder a otro equipo.

Ya que no se ni que versión de ChromeOS tienes, siempre es bueno tener a la mano la lista de comandos con los que dispones, para ello utilizamos el comando help_advance, como la salida de este comando es demasiado larga para poner una imagen dejo la salida pegada en texto plano.

crosh> help_advanced 
autest [-scheduled]  
  Trigger an auto-update. To fake a scheduled update check use -scheduled.
authpolicy_debug <level>  
  Set authpolicy daemon debugging level.
  <level> can be 0 (quiet), 1 (taciturn), 2 (chatty), or 3 (verbose).
battery_firmware <info|check|update>  
  info : Query battery info.
  check : Check whether the AC adapter is connected.
  Also check whether the battery firmware is the latest.
  update : Trigger battery firmware update.
battery_test [<test length>]  
  Tests battery discharge rate for given number of seconds. Without an argument,
  defaults to 300 seconds.
bt_console [<agent capability>]  
  Enters a Bluetooth debugging console. Optional argument specifies the
  capability of a pairing agent the console will provide; see the Bluetooth
  Core specification for valid options.
c <container name> [args]  
  Run a program inside a container
chaps_debug [start|stop|<log_level>]  
  Sets the chapsd logging level. No arguments will start verbose logging.
connectivity   
  Shows connectivity status. “connectivity help” for more details
cryptohome_status   
  Get human-readable status information from cryptohomed.
dmesg [-d|-k|-r|-t|-u|-x]  
  Display kernel log buffer
dump_emk   
  Show the EMK (Enterprise Machine Key).
enroll_status [–mode] [–domain] [–realm] [–user]  
  Displays device enrollment information.
evtest evtest  
  Run evtest in safe mode.
exit   
  Exit crosh.
ff_debug
Usage: ff_debug [<tag_expression>]|[–reset]|[–help]|[–list_valid_tags]|[–level <level>]
  ff_debug adds and removes debug tags for flimflam.
  Current debug settings are displayed if no parameters are provided
  <tag_expression> is defined in boolean notation using <debug_tag> separated
  by an operator [+-], where + and – imply adding and removing of the tag immediately
  following the operator. An expression beginning with either operators [+-]
  takes the existing tags and modifies them appropriately. Otherwise, the existing tags
  are replaced by those specified in the command.
  <debug_tag> can be listed using the –list_valid_tags
  e.g.: ff_debug network+wifi
  Sets debug tags to network and wifi
  e.g.: ff_debug +network-service
  Adds network and removes service tags from the existing debug settings
  –list_valid_tags : Displays all valid tags
  –level: Displays or sets current debug level for logging
  All messages at, or above, the current log level are logged. Normal log
  levels range from 4 (LOG_FATAL) to 0 (LOG_INFO). In addition VERBOSE log
  levels are available starting at -1.
  e.g.: ff_debug –level 4
  Logs only FATAL messages.
  e.g.: ff_debug –level 0
  Logs INFO, WARNING, ERROR, ERROR_REPORT, and FATAL messages.
  e.g.: ff_debug –level -4
  Logs everything that –level 0 does, plus SLOG(<tag>, <n>) messages,
  where <tag> has been enabled for logging, and <n> <= 4. (NOTE: you must
  negate SLOG levels for use with ff_debug. In this example, SLOG(<tag>, 4)
  maps to –level -4.)
  –reset : Removes all tagging
  –help : Displays this output
free [options]  
  Display free/used memory info
help [command]  
  Display general help, or details for a specific command.
help_advanced   
  Display the help for more advanced commands, mainly used for debugging.
meminfo   
  Display detailed memory statistics
memory_test   
  Performs extensive memory testing on the available free memory.
modem <command> [args…]  
  Interact with the 3G modem. Run “modem help” for detailed help.
modem_set_carrier carrier-name  
  Configures the modem for the specified carrier.
network_diag
Usage: /usr/bin/network_diag [–date|–flimflam|–link|–show-macs|–wifi|–help|
  –wifi-mon] [host]
  –date: Diagnose time-of-day
  ([host] must support SSL)
  –dhcp: Display DHCP information
  –flimflam: Diagnose flimflam status
  –hosts: Diagnose SSL connection to Google hosts
  –interface: Diagnose interface status
  –latency: Diagnose link-latency to default gateway
  –link: Diagnose all network links
  –no-log: Do not log output
  –proxy: Specify proxy to use with tests
  –route: Diagnose routes to each host
  –show-macs: Display full MAC addresses
  –wifi: Display driver-specific debugging information
  –wifi-mon: Monitor WiFi performance metrics
  –help: Display this message
  [host] Hostname to perform web access test on (default: clients3.google.com)
p2p_update [enable|disable] [–num-connections] [–show-peers]  
  Enables or disables the peer-to-peer (P2P) sharing of updates over the local
  network. This will both attempt to get updates from other peers in the
  network and share the downloaded updates with them. Run this command without
  arguments to see the current state. Additional switches will display number
  of connections and P2P peers.
ping [-4] [-6] [-c count] [-i interval] [-n] [-s packetsize] [-W waittime] <destination>  
  Send ICMP ECHO_REQUEST packets to a network host. If <destination> is “gw”
  then the next hop gateway for the default route is used.
  Default is to use IPv4 [-4] rather than IPv6 [-6] addresses.
rlz < status | enable | disable >  
  Enable or disable RLZ. See this site for details:
rollback   
  Attempt to rollback to the previous update cached on your system. Only
  available on non-stable channels and non-enterprise enrolled devices. Please
  note that this will powerwash your device.
route [-4] [-6]  
  Display the routing tables.
  Default is to show IPv4 [-4] rather than IPv6 [-6] routes.
set_apn [-c] [-n <network-id>] [-u <username>] [-p <password>] <apn>  
  Set the APN to use when connecting to the network specified by <network-id>.
  If <network-id> is not specified, use the network-id of the currently
  registered network.
  The -c option clears the APN to be used, so that the default APN will be used
  instead.
set_arpgw <true | false>  
  Turn on extra network state checking to make sure the default gateway
  is reachable.
set_cellular_ppp [-c] [-u <username>] [-p <password>]  
  Set the PPP username and/or password for an existing cellular connection.
  If neither -u nor -p is provided, show the existing PPP username for
  the cellular connection.
  The -c option clears any existing PPP username and PPP password for an
  existing cellular connection.
set_time [<time string>]  
  Sets the system time if the the system has been unable to get it from the
  network. The <time string> uses the format of the GNU coreutils date command.
set_wake_on_lan <true | false>  
  Enable or disable Wake on LAN for Ethernet devices. This command takes
  effect after re-connecting to Ethernet and is not persistent across system
  restarts.
storage_test_1   
  Performs a short offline SMART test.
storage_test_2   
  Performs an extensive readability test.
swap [ enable <size (MB)> | disable | start | stop | status
 | set_margin <discard threshold (MB)> | set_extra_free <amount (MB)>
 | set_min_filelist <amount (MB)> ]  
  Manage the system swap file.
  The enable/disable options update the config file settings and will take
  effect at the next boot.
  The start/stop options will turn swap on/off immediately, but leave the config
  file settings alone (so next boot will revert back).
  Warning: If swap is heavily used, then turning it off might cause the system
  to hang while the kernel tries to release pages and free up memory. In some
  extreme situations, this can take a long time to finish.
  The set_margin option changes the low-memory warning margin immediately and
  persistently to the chosen amount (in MiB). A value of 0, or the string
  “default”, restore the default behavior. The current value is shown with
  “swap status”.
  Similarly, the set_min_filelist and set_extra_free change obscure kernel
  parameters (which are similarly named) in the same way.
syslog <message>  
  Logs a message to syslog (the system log daemon).
time_info   
  Returns the current synchronization state for the time service.
top   
  Run top.
tpm_status   
  Prints TPM (Trusted Platform Module) status information.
tracepath [-4] [-6] [-n] <destination>[/port]  
  Trace the path/route to a network host.
  Default is to trace IPv4 [-4] rather than IPv6 [-6] targets.
u2f_flags <u2f | g2f>[,verbose]  
  Set flags to override the second-factor authentication daemon configuration.
  u2f: Always enable the standard U2F mode even if not set in device policy.
  g2f: Always enable the U2F mode plus some additional extensions.
  verbose: Increase the daemon logging verbosity in /var/log/messages.
uname [-a|-s|-n|-r|-v|-m|-p|-i|-o]  
  Display system info
update_over_cellular [enable|disable]  
  Enables or disables the auto updates over cellular networks. Run without
  arguments to see the current state.
upload_crashes   
  Uploads available crash reports to the crash server.
upload_devcoredumps [enable|disable]  
  Enable or disable the upload of devcoredump reports.
uptime   
  Display uptime/load info
vmstat [-a|-d|-f|-m|-n|-s|-w] [delay [count]]  
  Report virtual memory statistics
wifi_power_save < status | enable | disable >  
  Enable or disable WiFi power save mode. This command is not persistent across
  system restarts.
wpa_debug
Usage: wpa_debug [level]|[–reset]|[–help][–list_valid_levels]
  wpa_debug sets the debug level of wpa_supplicant.
  Current debug level is displayed if no parameters are provided
  level: The level is the level we want to set the debugging level to. The valid
  levels can be viewed by using the –list_valid_levels flag
  eg: wpa_debug msgdump
  Sets the wpa_supplicant logging level to msgdump
  –reset : Resets the level to ‘info’
  –help : Displays this output
  –list_valid_levels: Displays the valid levels wpa_supplicant can be set t

Este tutorial fue realizado con una Chromebook acer CB3-532, con SSD de 16GB y RAM de 2GB (pocos recursos), y con mucho afán de que se cuente con más documentación de esta en español.

 

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