How to check if Ubuntu has booted in uefi mode?
I have installed Ubuntu 18.04 (Bionic Beaver) on 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 three 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 the 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 the third method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode.
Which is correct? Which is a reliable method for Ubuntu 18.04?
boot dual-boot 18.04 uefi
edited 1 hour ago
Peter Mortensen
1,03721016
asked 7 hours 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 (Bionic Beaver) on 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 three 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 the 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 the third method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode.
Which is correct? Which is a reliable method for Ubuntu 18.04?
boot dual-boot 18.04 uefi
edited 1 hour ago
Peter Mortensen
1,03721016
asked 7 hours 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 (Bionic Beaver) on 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 three 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 the 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 the third method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode.
Which is correct? Which is a reliable method for Ubuntu 18.04?
boot dual-boot 18.04 uefi
edited 1 hour ago
Peter Mortensen
1,03721016
asked 7 hours 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 (Bionic Beaver) on 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 three 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 the 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 the third method
[ -d /sys/firmware/efi ] && echo "Installed in UEFI mode" || echo "Installed in Legacy mode"
prints Installed in Legacy mode.
Which is correct? Which is a reliable method for Ubuntu 18.04?
boot dual-boot 18.04 uefi
boot dual-boot 18.04 uefi
edited 1 hour ago
Peter Mortensen
1,03721016
asked 7 hours 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.
edited 1 hour ago
Peter Mortensen
1,03721016
asked 7 hours 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.
edited 1 hour ago
Peter Mortensen
1,03721016
edited 1 hour ago
Peter Mortensen
1,03721016
edited 1 hour ago
Peter Mortensen
1,03721016
1,03721016
asked 7 hours 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 7 hours ago
Nagabhushan S NNagabhushan S N
1085
asked 7 hours 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 7 hours ago
Carlos DagorretCarlos Dagorret
49326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
3
You boot in BIOS mode
– Carlos Dagorret
7 hours 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 6 hours ago
sudodussudodus
23.4k32874
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
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 7 hours ago
Carlos DagorretCarlos Dagorret
49326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
3
You boot in BIOS mode
– Carlos Dagorret
7 hours 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 7 hours ago
Carlos DagorretCarlos Dagorret
49326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
3
You boot in BIOS mode
– Carlos Dagorret
7 hours 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 7 hours ago
Carlos DagorretCarlos Dagorret
49326
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 7 hours ago
Carlos DagorretCarlos Dagorret
49326
edited 7 hours ago
answered 7 hours ago
Carlos DagorretCarlos Dagorret
49326
answered 7 hours ago
Carlos DagorretCarlos Dagorret
49326
answered 7 hours ago
Carlos DagorretCarlos Dagorret
49326
49326
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
3
You boot in BIOS mode
– Carlos Dagorret
7 hours ago
add a comment |
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
3
You boot in BIOS mode
– Carlos Dagorret
7 hours ago
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
This directory is not present. But fstab file has boot/efi mount-point. Ambiguous right?
– Nagabhushan S N
7 hours ago
3
3
You boot in BIOS mode
– Carlos Dagorret
7 hours ago
You boot in BIOS mode
– Carlos Dagorret
7 hours 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 6 hours 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 6 hours 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 6 hours 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 6 hours ago
sudodussudodus
23.4k32874
answered 6 hours ago
sudodussudodus
23.4k32874
answered 6 hours ago
sudodussudodus
23.4k32874
answered 6 hours 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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