Sed Usage to update GRUB file
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I am new to using sed but quickly learning to love it for its general flexibility in automation. I am looking to run a script with various security controls every time I deploy a new system, and part of that requires me to lock down the GRUB. I am looking to unlock the general Ubuntu option from the GRUB menu so anyone can use it after that without a password, while keeping everything else password protected.
that being said, I am looking to search the /boot/grub/grub.cfg file for a specific line and add --unrestricted to that option. ( We only use 16.04.03 so all systems would theoretically have the same file upon install )
The line in the file is:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
And I want it to look like:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
I know sed -i is for in place editing and s/ should search. But beyond that I am lost on the syntax here to make it actually do what we need. As far as I can tell, that positioning of --unrestricted is needed as I believe it would be easier if we didnt have to have such a long search, but again I am new to sed and unsure. Could someone help me with this sed insertion? Preferably also explain to me why different syntax goes where it does, so I know for the future.
16.04 grub2 bash scripts sed
asked 17 mins ago
Brendan77222Brendan77222
387
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I am new to using sed but quickly learning to love it for its general flexibility in automation. I am looking to run a script with various security controls every time I deploy a new system, and part of that requires me to lock down the GRUB. I am looking to unlock the general Ubuntu option from the GRUB menu so anyone can use it after that without a password, while keeping everything else password protected.
that being said, I am looking to search the /boot/grub/grub.cfg file for a specific line and add --unrestricted to that option. ( We only use 16.04.03 so all systems would theoretically have the same file upon install )
The line in the file is:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
And I want it to look like:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
I know sed -i is for in place editing and s/ should search. But beyond that I am lost on the syntax here to make it actually do what we need. As far as I can tell, that positioning of --unrestricted is needed as I believe it would be easier if we didnt have to have such a long search, but again I am new to sed and unsure. Could someone help me with this sed insertion? Preferably also explain to me why different syntax goes where it does, so I know for the future.
16.04 grub2 bash scripts sed
asked 17 mins ago
Brendan77222Brendan77222
387
New contributor
Brendan77222 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 am new to using sed but quickly learning to love it for its general flexibility in automation. I am looking to run a script with various security controls every time I deploy a new system, and part of that requires me to lock down the GRUB. I am looking to unlock the general Ubuntu option from the GRUB menu so anyone can use it after that without a password, while keeping everything else password protected.
that being said, I am looking to search the /boot/grub/grub.cfg file for a specific line and add --unrestricted to that option. ( We only use 16.04.03 so all systems would theoretically have the same file upon install )
The line in the file is:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
And I want it to look like:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
I know sed -i is for in place editing and s/ should search. But beyond that I am lost on the syntax here to make it actually do what we need. As far as I can tell, that positioning of --unrestricted is needed as I believe it would be easier if we didnt have to have such a long search, but again I am new to sed and unsure. Could someone help me with this sed insertion? Preferably also explain to me why different syntax goes where it does, so I know for the future.
16.04 grub2 bash scripts sed
asked 17 mins ago
Brendan77222Brendan77222
387
New contributor
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am new to using sed but quickly learning to love it for its general flexibility in automation. I am looking to run a script with various security controls every time I deploy a new system, and part of that requires me to lock down the GRUB. I am looking to unlock the general Ubuntu option from the GRUB menu so anyone can use it after that without a password, while keeping everything else password protected.
that being said, I am looking to search the /boot/grub/grub.cfg file for a specific line and add --unrestricted to that option. ( We only use 16.04.03 so all systems would theoretically have the same file upon install )
The line in the file is:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
And I want it to look like:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-simple-2aa7ed2c-67a7-42d5-84fb-0ddab74c5dd0' {
I know sed -i is for in place editing and s/ should search. But beyond that I am lost on the syntax here to make it actually do what we need. As far as I can tell, that positioning of --unrestricted is needed as I believe it would be easier if we didnt have to have such a long search, but again I am new to sed and unsure. Could someone help me with this sed insertion? Preferably also explain to me why different syntax goes where it does, so I know for the future.
16.04 grub2 bash scripts sed
16.04 grub2 bash scripts sed
asked 17 mins ago
Brendan77222Brendan77222
387
New contributor
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 17 mins ago
Brendan77222Brendan77222
387
New contributor
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 17 mins ago
Brendan77222Brendan77222
387
New contributor
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 17 mins ago
Brendan77222Brendan77222
387
asked 17 mins ago
Brendan77222Brendan77222
387
387
New contributor
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Brendan77222 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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