What does “rf” mean in “rfkill”?rfkill does not work for all the devices listedWhat is the difference...

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What does “rf” mean in “rfkill”?


rfkill does not work for all the devices listedWhat is the difference between “ifconfig interface down” and “rfkill block”?How do you automatically rfkill unblock all on startup?What is causing my Intel 7260 bluetooth device to disconnect when I unblock it with rfkill?Operation not possible due to RF-kill, phy0 hard blockedWiFi soft-blocked by rfkill on startupcannot unblock wifi hard block with anything on Lenovo x230tIs it possible to bypass a hardware wifi switch, if `rfkill unblock all` does not work?rfkill blocks multiple adaptersCan't open RFKILL control device: No such file or directory






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In Linux there is a program called "rfkill". You can (de)activate radio modules with that. I was interested in the question what "rf" means. But I cant find an explanation. Maybe somebody here knows that?










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    4















    In Linux there is a program called "rfkill". You can (de)activate radio modules with that. I was interested in the question what "rf" means. But I cant find an explanation. Maybe somebody here knows that?










    share|improve this question







    New contributor




    Henry Weinert is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      4












      4








      4








      In Linux there is a program called "rfkill". You can (de)activate radio modules with that. I was interested in the question what "rf" means. But I cant find an explanation. Maybe somebody here knows that?










      share|improve this question







      New contributor




      Henry Weinert is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      In Linux there is a program called "rfkill". You can (de)activate radio modules with that. I was interested in the question what "rf" means. But I cant find an explanation. Maybe somebody here knows that?







      rfkill






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      Henry WeinertHenry Weinert

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          2 Answers
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          5














          RF stands for radio frequency. As per Linux Wireless Wiki:




          rfkill is a small userspace tool to query the state of the rfkill
          switches, buttons and subsystem interfaces. Some devices come with a
          hard switch that lets you kill different types of RF radios:
          802.11 / Bluetooth / NFC / UWB / WAN / WIMAX / FM. Some times these buttons may kill more than one RF type. The Linux kernel rfkill
          subsystem exposes these hardware buttons and lets userspace query its
          status and set its status through a /dev/rfkill. Given that at times
          some RF devices do not have hardware rfkill buttons rfkill the Linux
          kernel also exposes software rfkill capabilities that allows userspace
          to mimic a hardware rfkill event and turn on or off RF.




          On the side note if it hasn't become obvious yet, Wifi and Bluetooth devices are in fact radios and use digital modulation such as QPSK/DPSK instead of AM or FM (source - I'm EET student). Note also that rfkill is a userspace command to expose functionality avaiilable in Linux kernel's RFKill subsystem:




          Many computer systems contain radio transmitters, including Wi-Fi,
          Bluetooth, and 3G devices. These devices consume power, which is
          wasted when the device is not in use. RFKill is a subsystem in the
          Linux kernel that provides an interface through which radio
          transmitters in a computer system can be queried, activated, and
          deactivated. When transmitters are deactivated, they can be placed in
          a state where software can reactive them (a soft block) or where
          software cannot reactive them (a hard block).







          share|improve this answer


























          • The FM quote makes me think of a new song twist "RF killed the Radio Star".

            – WinEunuuchs2Unix
            21 mins ago



















          1














          RF stands for "Radio Frequency". The first transatlantic RF transmission was received in St. John's Canada in 1901. RF is used for radios, TVs (not so much these days), walkie talkies, cell phones, etc. From your point of view RF is limited in maximum range of 10 meters to 30 meters.



          RF is often associated with Wi-Fi. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. The false notion that the brand name "Wi-Fi" is short for "wireless fidelity" has spread to such an extent that even industry leaders have included the phrase wireless fidelity in a press release.



          The misnomer of "Wi-Fi" by the masses is most likely caused by brain memory of "Hi-Fi" which stood for "High Fidelity" in stereophonic equipment. (Not source for this one it's just my hunch).



          Wi-Fi hotspots, Wi-Fi home networks and Wi-Fi business networks are used to connect computers and smartphones to the internet without wires. Therefore RF (Radio Frequency) becomes the backbone / transport layer that replaces the wires (Cat 5/5e, etc).



          rfkill is simply a way of resetting computers and smartphones connect via Radio Frequencies (RF) to the internet. It can even reset devices such as speakers, mice, keyboards, etc. In this case the devices are connect with the "Bluetooth" standard.



          Devices can also be connected to your computer with IR (Infrared) but this requires line of sight and doesn't use RF which bounce around. AM Radio bounces off the sky, FM Radio goes across the horizon. All types of RF are out there, including those from deep space. One discovered this year could be from an alien spaceship (if you believe that ;)).






          share|improve this answer
























          • While RFKill deals with more than just wifi, there are some interesting historical notes here

            – Sergiy Kolodyazhnyy
            24 mins ago











          • @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

            – WinEunuuchs2Unix
            22 mins ago












          Your Answer








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          2 Answers
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          2 Answers
          2






          active

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          active

          oldest

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          active

          oldest

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          5














          RF stands for radio frequency. As per Linux Wireless Wiki:




          rfkill is a small userspace tool to query the state of the rfkill
          switches, buttons and subsystem interfaces. Some devices come with a
          hard switch that lets you kill different types of RF radios:
          802.11 / Bluetooth / NFC / UWB / WAN / WIMAX / FM. Some times these buttons may kill more than one RF type. The Linux kernel rfkill
          subsystem exposes these hardware buttons and lets userspace query its
          status and set its status through a /dev/rfkill. Given that at times
          some RF devices do not have hardware rfkill buttons rfkill the Linux
          kernel also exposes software rfkill capabilities that allows userspace
          to mimic a hardware rfkill event and turn on or off RF.




          On the side note if it hasn't become obvious yet, Wifi and Bluetooth devices are in fact radios and use digital modulation such as QPSK/DPSK instead of AM or FM (source - I'm EET student). Note also that rfkill is a userspace command to expose functionality avaiilable in Linux kernel's RFKill subsystem:




          Many computer systems contain radio transmitters, including Wi-Fi,
          Bluetooth, and 3G devices. These devices consume power, which is
          wasted when the device is not in use. RFKill is a subsystem in the
          Linux kernel that provides an interface through which radio
          transmitters in a computer system can be queried, activated, and
          deactivated. When transmitters are deactivated, they can be placed in
          a state where software can reactive them (a soft block) or where
          software cannot reactive them (a hard block).







          share|improve this answer


























          • The FM quote makes me think of a new song twist "RF killed the Radio Star".

            – WinEunuuchs2Unix
            21 mins ago
















          5














          RF stands for radio frequency. As per Linux Wireless Wiki:




          rfkill is a small userspace tool to query the state of the rfkill
          switches, buttons and subsystem interfaces. Some devices come with a
          hard switch that lets you kill different types of RF radios:
          802.11 / Bluetooth / NFC / UWB / WAN / WIMAX / FM. Some times these buttons may kill more than one RF type. The Linux kernel rfkill
          subsystem exposes these hardware buttons and lets userspace query its
          status and set its status through a /dev/rfkill. Given that at times
          some RF devices do not have hardware rfkill buttons rfkill the Linux
          kernel also exposes software rfkill capabilities that allows userspace
          to mimic a hardware rfkill event and turn on or off RF.




          On the side note if it hasn't become obvious yet, Wifi and Bluetooth devices are in fact radios and use digital modulation such as QPSK/DPSK instead of AM or FM (source - I'm EET student). Note also that rfkill is a userspace command to expose functionality avaiilable in Linux kernel's RFKill subsystem:




          Many computer systems contain radio transmitters, including Wi-Fi,
          Bluetooth, and 3G devices. These devices consume power, which is
          wasted when the device is not in use. RFKill is a subsystem in the
          Linux kernel that provides an interface through which radio
          transmitters in a computer system can be queried, activated, and
          deactivated. When transmitters are deactivated, they can be placed in
          a state where software can reactive them (a soft block) or where
          software cannot reactive them (a hard block).







          share|improve this answer


























          • The FM quote makes me think of a new song twist "RF killed the Radio Star".

            – WinEunuuchs2Unix
            21 mins ago














          5












          5








          5







          RF stands for radio frequency. As per Linux Wireless Wiki:




          rfkill is a small userspace tool to query the state of the rfkill
          switches, buttons and subsystem interfaces. Some devices come with a
          hard switch that lets you kill different types of RF radios:
          802.11 / Bluetooth / NFC / UWB / WAN / WIMAX / FM. Some times these buttons may kill more than one RF type. The Linux kernel rfkill
          subsystem exposes these hardware buttons and lets userspace query its
          status and set its status through a /dev/rfkill. Given that at times
          some RF devices do not have hardware rfkill buttons rfkill the Linux
          kernel also exposes software rfkill capabilities that allows userspace
          to mimic a hardware rfkill event and turn on or off RF.




          On the side note if it hasn't become obvious yet, Wifi and Bluetooth devices are in fact radios and use digital modulation such as QPSK/DPSK instead of AM or FM (source - I'm EET student). Note also that rfkill is a userspace command to expose functionality avaiilable in Linux kernel's RFKill subsystem:




          Many computer systems contain radio transmitters, including Wi-Fi,
          Bluetooth, and 3G devices. These devices consume power, which is
          wasted when the device is not in use. RFKill is a subsystem in the
          Linux kernel that provides an interface through which radio
          transmitters in a computer system can be queried, activated, and
          deactivated. When transmitters are deactivated, they can be placed in
          a state where software can reactive them (a soft block) or where
          software cannot reactive them (a hard block).







          share|improve this answer















          RF stands for radio frequency. As per Linux Wireless Wiki:




          rfkill is a small userspace tool to query the state of the rfkill
          switches, buttons and subsystem interfaces. Some devices come with a
          hard switch that lets you kill different types of RF radios:
          802.11 / Bluetooth / NFC / UWB / WAN / WIMAX / FM. Some times these buttons may kill more than one RF type. The Linux kernel rfkill
          subsystem exposes these hardware buttons and lets userspace query its
          status and set its status through a /dev/rfkill. Given that at times
          some RF devices do not have hardware rfkill buttons rfkill the Linux
          kernel also exposes software rfkill capabilities that allows userspace
          to mimic a hardware rfkill event and turn on or off RF.




          On the side note if it hasn't become obvious yet, Wifi and Bluetooth devices are in fact radios and use digital modulation such as QPSK/DPSK instead of AM or FM (source - I'm EET student). Note also that rfkill is a userspace command to expose functionality avaiilable in Linux kernel's RFKill subsystem:




          Many computer systems contain radio transmitters, including Wi-Fi,
          Bluetooth, and 3G devices. These devices consume power, which is
          wasted when the device is not in use. RFKill is a subsystem in the
          Linux kernel that provides an interface through which radio
          transmitters in a computer system can be queried, activated, and
          deactivated. When transmitters are deactivated, they can be placed in
          a state where software can reactive them (a soft block) or where
          software cannot reactive them (a hard block).








          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 52 mins ago

























          answered 58 mins ago









          Sergiy KolodyazhnyySergiy Kolodyazhnyy

          75.9k9158333




          75.9k9158333













          • The FM quote makes me think of a new song twist "RF killed the Radio Star".

            – WinEunuuchs2Unix
            21 mins ago



















          • The FM quote makes me think of a new song twist "RF killed the Radio Star".

            – WinEunuuchs2Unix
            21 mins ago

















          The FM quote makes me think of a new song twist "RF killed the Radio Star".

          – WinEunuuchs2Unix
          21 mins ago





          The FM quote makes me think of a new song twist "RF killed the Radio Star".

          – WinEunuuchs2Unix
          21 mins ago













          1














          RF stands for "Radio Frequency". The first transatlantic RF transmission was received in St. John's Canada in 1901. RF is used for radios, TVs (not so much these days), walkie talkies, cell phones, etc. From your point of view RF is limited in maximum range of 10 meters to 30 meters.



          RF is often associated with Wi-Fi. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. The false notion that the brand name "Wi-Fi" is short for "wireless fidelity" has spread to such an extent that even industry leaders have included the phrase wireless fidelity in a press release.



          The misnomer of "Wi-Fi" by the masses is most likely caused by brain memory of "Hi-Fi" which stood for "High Fidelity" in stereophonic equipment. (Not source for this one it's just my hunch).



          Wi-Fi hotspots, Wi-Fi home networks and Wi-Fi business networks are used to connect computers and smartphones to the internet without wires. Therefore RF (Radio Frequency) becomes the backbone / transport layer that replaces the wires (Cat 5/5e, etc).



          rfkill is simply a way of resetting computers and smartphones connect via Radio Frequencies (RF) to the internet. It can even reset devices such as speakers, mice, keyboards, etc. In this case the devices are connect with the "Bluetooth" standard.



          Devices can also be connected to your computer with IR (Infrared) but this requires line of sight and doesn't use RF which bounce around. AM Radio bounces off the sky, FM Radio goes across the horizon. All types of RF are out there, including those from deep space. One discovered this year could be from an alien spaceship (if you believe that ;)).






          share|improve this answer
























          • While RFKill deals with more than just wifi, there are some interesting historical notes here

            – Sergiy Kolodyazhnyy
            24 mins ago











          • @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

            – WinEunuuchs2Unix
            22 mins ago
















          1














          RF stands for "Radio Frequency". The first transatlantic RF transmission was received in St. John's Canada in 1901. RF is used for radios, TVs (not so much these days), walkie talkies, cell phones, etc. From your point of view RF is limited in maximum range of 10 meters to 30 meters.



          RF is often associated with Wi-Fi. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. The false notion that the brand name "Wi-Fi" is short for "wireless fidelity" has spread to such an extent that even industry leaders have included the phrase wireless fidelity in a press release.



          The misnomer of "Wi-Fi" by the masses is most likely caused by brain memory of "Hi-Fi" which stood for "High Fidelity" in stereophonic equipment. (Not source for this one it's just my hunch).



          Wi-Fi hotspots, Wi-Fi home networks and Wi-Fi business networks are used to connect computers and smartphones to the internet without wires. Therefore RF (Radio Frequency) becomes the backbone / transport layer that replaces the wires (Cat 5/5e, etc).



          rfkill is simply a way of resetting computers and smartphones connect via Radio Frequencies (RF) to the internet. It can even reset devices such as speakers, mice, keyboards, etc. In this case the devices are connect with the "Bluetooth" standard.



          Devices can also be connected to your computer with IR (Infrared) but this requires line of sight and doesn't use RF which bounce around. AM Radio bounces off the sky, FM Radio goes across the horizon. All types of RF are out there, including those from deep space. One discovered this year could be from an alien spaceship (if you believe that ;)).






          share|improve this answer
























          • While RFKill deals with more than just wifi, there are some interesting historical notes here

            – Sergiy Kolodyazhnyy
            24 mins ago











          • @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

            – WinEunuuchs2Unix
            22 mins ago














          1












          1








          1







          RF stands for "Radio Frequency". The first transatlantic RF transmission was received in St. John's Canada in 1901. RF is used for radios, TVs (not so much these days), walkie talkies, cell phones, etc. From your point of view RF is limited in maximum range of 10 meters to 30 meters.



          RF is often associated with Wi-Fi. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. The false notion that the brand name "Wi-Fi" is short for "wireless fidelity" has spread to such an extent that even industry leaders have included the phrase wireless fidelity in a press release.



          The misnomer of "Wi-Fi" by the masses is most likely caused by brain memory of "Hi-Fi" which stood for "High Fidelity" in stereophonic equipment. (Not source for this one it's just my hunch).



          Wi-Fi hotspots, Wi-Fi home networks and Wi-Fi business networks are used to connect computers and smartphones to the internet without wires. Therefore RF (Radio Frequency) becomes the backbone / transport layer that replaces the wires (Cat 5/5e, etc).



          rfkill is simply a way of resetting computers and smartphones connect via Radio Frequencies (RF) to the internet. It can even reset devices such as speakers, mice, keyboards, etc. In this case the devices are connect with the "Bluetooth" standard.



          Devices can also be connected to your computer with IR (Infrared) but this requires line of sight and doesn't use RF which bounce around. AM Radio bounces off the sky, FM Radio goes across the horizon. All types of RF are out there, including those from deep space. One discovered this year could be from an alien spaceship (if you believe that ;)).






          share|improve this answer













          RF stands for "Radio Frequency". The first transatlantic RF transmission was received in St. John's Canada in 1901. RF is used for radios, TVs (not so much these days), walkie talkies, cell phones, etc. From your point of view RF is limited in maximum range of 10 meters to 30 meters.



          RF is often associated with Wi-Fi. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. The false notion that the brand name "Wi-Fi" is short for "wireless fidelity" has spread to such an extent that even industry leaders have included the phrase wireless fidelity in a press release.



          The misnomer of "Wi-Fi" by the masses is most likely caused by brain memory of "Hi-Fi" which stood for "High Fidelity" in stereophonic equipment. (Not source for this one it's just my hunch).



          Wi-Fi hotspots, Wi-Fi home networks and Wi-Fi business networks are used to connect computers and smartphones to the internet without wires. Therefore RF (Radio Frequency) becomes the backbone / transport layer that replaces the wires (Cat 5/5e, etc).



          rfkill is simply a way of resetting computers and smartphones connect via Radio Frequencies (RF) to the internet. It can even reset devices such as speakers, mice, keyboards, etc. In this case the devices are connect with the "Bluetooth" standard.



          Devices can also be connected to your computer with IR (Infrared) but this requires line of sight and doesn't use RF which bounce around. AM Radio bounces off the sky, FM Radio goes across the horizon. All types of RF are out there, including those from deep space. One discovered this year could be from an alien spaceship (if you believe that ;)).







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 28 mins ago









          WinEunuuchs2UnixWinEunuuchs2Unix

          48.8k1198187




          48.8k1198187













          • While RFKill deals with more than just wifi, there are some interesting historical notes here

            – Sergiy Kolodyazhnyy
            24 mins ago











          • @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

            – WinEunuuchs2Unix
            22 mins ago



















          • While RFKill deals with more than just wifi, there are some interesting historical notes here

            – Sergiy Kolodyazhnyy
            24 mins ago











          • @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

            – WinEunuuchs2Unix
            22 mins ago

















          While RFKill deals with more than just wifi, there are some interesting historical notes here

          – Sergiy Kolodyazhnyy
          24 mins ago





          While RFKill deals with more than just wifi, there are some interesting historical notes here

          – Sergiy Kolodyazhnyy
          24 mins ago













          @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

          – WinEunuuchs2Unix
          22 mins ago





          @SergiyKolodyazhnyy I did add "Bluetooth" at the end which is probably used the most with rfkill. Besides the "historical notes" at the beginning I threw in "Alien spaceships" at the end for the future ;)

          – WinEunuuchs2Unix
          22 mins ago










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