How to check if ubuntu has booted in uefi mode?
I have installed ubuntu 18.04 in my pc in dual boot with windows 10. I need to check if ubuntu is booting in uefi mode or legacy mode. I found a few sources online to check this, but I'm getting ambiguous results.
To be specific, this page, section "Identifying if an Ubuntu has been installed in UEFI mode" gives 3 ways to check this.
- its /etc/fstab file contains an UEFI partition (mount point: /boot/efi)
- it uses the grub-efi bootloader (not grub-pc)
- from the installed Ubuntu, open a terminal (Ctrl+Alt+T) then type the following command:
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
I tried 1st and 3rd ways.
My fstab file contains the below entry:
UUID=xxx /boot/efi ntfs defaults 0 1
So, that means ubuntu has booted in uefi mode.
But running the command given in 3rd method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode
So, my question is which is correct? Which is a reliable method for ubuntu 18.04?
boot dual-boot 18.04 uefi
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have installed ubuntu 18.04 in my pc in dual boot with windows 10. I need to check if ubuntu is booting in uefi mode or legacy mode. I found a few sources online to check this, but I'm getting ambiguous results.
To be specific, this page, section "Identifying if an Ubuntu has been installed in UEFI mode" gives 3 ways to check this.
- its /etc/fstab file contains an UEFI partition (mount point: /boot/efi)
- it uses the grub-efi bootloader (not grub-pc)
- from the installed Ubuntu, open a terminal (Ctrl+Alt+T) then type the following command:
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
I tried 1st and 3rd ways.
My fstab file contains the below entry:
UUID=xxx /boot/efi ntfs defaults 0 1
So, that means ubuntu has booted in uefi mode.
But running the command given in 3rd method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode
So, my question is which is correct? Which is a reliable method for ubuntu 18.04?
boot dual-boot 18.04 uefi
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have installed ubuntu 18.04 in my pc in dual boot with windows 10. I need to check if ubuntu is booting in uefi mode or legacy mode. I found a few sources online to check this, but I'm getting ambiguous results.
To be specific, this page, section "Identifying if an Ubuntu has been installed in UEFI mode" gives 3 ways to check this.
- its /etc/fstab file contains an UEFI partition (mount point: /boot/efi)
- it uses the grub-efi bootloader (not grub-pc)
- from the installed Ubuntu, open a terminal (Ctrl+Alt+T) then type the following command:
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
I tried 1st and 3rd ways.
My fstab file contains the below entry:
UUID=xxx /boot/efi ntfs defaults 0 1
So, that means ubuntu has booted in uefi mode.
But running the command given in 3rd method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode
So, my question is which is correct? Which is a reliable method for ubuntu 18.04?
boot dual-boot 18.04 uefi
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have installed ubuntu 18.04 in my pc in dual boot with windows 10. I need to check if ubuntu is booting in uefi mode or legacy mode. I found a few sources online to check this, but I'm getting ambiguous results.
To be specific, this page, section "Identifying if an Ubuntu has been installed in UEFI mode" gives 3 ways to check this.
- its /etc/fstab file contains an UEFI partition (mount point: /boot/efi)
- it uses the grub-efi bootloader (not grub-pc)
- from the installed Ubuntu, open a terminal (Ctrl+Alt+T) then type the following command:
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
I tried 1st and 3rd ways.
My fstab file contains the below entry:
UUID=xxx /boot/efi ntfs defaults 0 1
So, that means ubuntu has booted in uefi mode.
But running the command given in 3rd method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode
So, my question is which is correct? Which is a reliable method for ubuntu 18.04?
boot dual-boot 18.04 uefi
boot dual-boot 18.04 uefi
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
asked 1 hour ago
Nagabhushan S NNagabhushan S N
1085
1085
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Nagabhushan S N is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
The easiest way to find out if you are running UEFI or BIOS is to look for a folder /sys/firmware/efi.
The folder will be missing if your system is using BIOS.
Execute:
$ ls /sys/firmware/efi
Example of UEFI boot output :
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
2
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
add a comment |
You can use the following command line,
test -d /sys/firmware/efi && echo efi || echo bios
or longer but easier to understand
if test -d /sys/firmware/efi;then echo efi;else echo bios;fi
See the following link,
help.ubuntu.com/community/Installation/FromUSBStick#Test_if_running_in_UEFI_mode
answered 17 mins ago
sudodussudodus
23.4k32874
add a comment |
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2 Answers
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oldest
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2 Answers
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active
oldest
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active
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votes
The easiest way to find out if you are running UEFI or BIOS is to look for a folder /sys/firmware/efi.
The folder will be missing if your system is using BIOS.
Execute:
$ ls /sys/firmware/efi
Example of UEFI boot output :
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
2
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
add a comment |
The easiest way to find out if you are running UEFI or BIOS is to look for a folder /sys/firmware/efi.
The folder will be missing if your system is using BIOS.
Execute:
$ ls /sys/firmware/efi
Example of UEFI boot output :
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
2
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
add a comment |
The easiest way to find out if you are running UEFI or BIOS is to look for a folder /sys/firmware/efi.
The folder will be missing if your system is using BIOS.
Execute:
$ ls /sys/firmware/efi
Example of UEFI boot output :
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
The easiest way to find out if you are running UEFI or BIOS is to look for a folder /sys/firmware/efi.
The folder will be missing if your system is using BIOS.
Execute:
$ ls /sys/firmware/efi
Example of UEFI boot output :
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
edited 1 hour ago
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
answered 1 hour ago
Carlos DagorretCarlos Dagorret
48326
48326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
2
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
add a comment |
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
2
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
1 hour ago
2
2
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
You boot in BIOS mode
– Carlos Dagorret
1 hour ago
add a comment |
You can use the following command line,
test -d /sys/firmware/efi && echo efi || echo bios
or longer but easier to understand
if test -d /sys/firmware/efi;then echo efi;else echo bios;fi
See the following link,
help.ubuntu.com/community/Installation/FromUSBStick#Test_if_running_in_UEFI_mode
answered 17 mins ago
sudodussudodus
23.4k32874
add a comment |
You can use the following command line,
test -d /sys/firmware/efi && echo efi || echo bios
or longer but easier to understand
if test -d /sys/firmware/efi;then echo efi;else echo bios;fi
See the following link,
help.ubuntu.com/community/Installation/FromUSBStick#Test_if_running_in_UEFI_mode
answered 17 mins ago
sudodussudodus
23.4k32874
add a comment |
You can use the following command line,
test -d /sys/firmware/efi && echo efi || echo bios
or longer but easier to understand
if test -d /sys/firmware/efi;then echo efi;else echo bios;fi
See the following link,
help.ubuntu.com/community/Installation/FromUSBStick#Test_if_running_in_UEFI_mode
answered 17 mins ago
sudodussudodus
23.4k32874
You can use the following command line,
test -d /sys/firmware/efi && echo efi || echo bios
or longer but easier to understand
if test -d /sys/firmware/efi;then echo efi;else echo bios;fi
See the following link,
help.ubuntu.com/community/Installation/FromUSBStick#Test_if_running_in_UEFI_mode
answered 17 mins ago
sudodussudodus
23.4k32874
answered 17 mins ago
sudodussudodus
23.4k32874
answered 17 mins ago
sudodussudodus
23.4k32874
answered 17 mins ago
sudodussudodus
23.4k32874
23.4k32874
add a comment |
add a comment |
Nagabhushan S N is a new contributor. Be nice, and check out our Code of Conduct.
Nagabhushan S N is a new contributor. Be nice, and check out our Code of Conduct.
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