CODEWITHSUNDEEP
sed
J.Doe rano
J.Doe rano

Reputation: 11

command to append a string in a file

I want to change a remote file. For this i use sed command. I have file with following content:

GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX=/ankur
GRUB_DISABLE_RECOVERY="true"

So I want to append in this file.
I have tried this command:

sed -i 's+^GRUB_CMDLINE_LINUX.*+GRUB_CMDLINE_LINUX=/sharma+g' '/etc/default/grub.bak'

But it changed to value of GRUB_CMDLINE_LINUX. But I want to append sharma to it initial value.

So the sed command should give the below output for the above file.

expected output:

GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX=/ankur sharma
GRUB_DISABLE_RECOVERY="true"

Upvotes: 0

Views: 77

Answers (1)

RavinderSingh13
RavinderSingh13

Reputation: 133770

Could you please try following simple sed once. Please use -i option in case you want to place output into Input_file itself.

sed '/GRUB_CMDLINE_LINUX/s/$/ sharma/'  Input_file

Upvotes: 5

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