Score:-1

Ubuntu

SED- replace result at file with anther one

HELLBOY

10/21/23, 8:00 AM

I am trying to replace result at file with result of anther. Basically trying to replace ip address at netplan file,It does not work.

this is the sentence:

sed -i "s/$(cat /etc/netplan/00-installer-config.yaml |grep - |head -n1 |tr -d "-" |awk -F / '{print $1}')/$(ip add show |grep ens160 |grep inet |awk '{print $2}' |awk -F / '{print $1}')/g" /etc/netplan/00-installer-config.yaml

Thanks in advance,

update:

found the problem needed to delete space sed "s/$(cat /etc/netplan/00-installer-config.yaml |grep - |head -n1 |tr -d "-" |awk -F / '{print $1}' |tr -d " " )/$(ip add show |grep ens160 |grep inet |awk '{print $2}' |awk -F / '{print $1}')/g" /etc/netplan/00-installer-config.yaml

Shay

102

2 + 11

bash

sed

David

10/21/23, 8:06 AM

What version of Ubuntu are you using? I can see your command but I do not see a result or an error message.

pLumo

10/21/23, 8:18 AM

It would help if you separate your commands and save as variables. Then you can check if these are fine and give us information on their output.

pLumo

10/21/23, 8:19 AM

please add output of: `echo $(cat /etc/netplan/00-installer-config.yaml |grep - |head -n1 |tr -d "-" |awk -F / '{print $1}')` and `echo $(ip add show |grep ens160 |grep inet |awk '{print $2}' |awk -F / '{print $1}')`

pLumo

10/21/23, 8:20 AM

btw, there is `yq` to parse `yaml`.

HELLBOY

10/21/23, 8:32 AM

Hi all, ubuntu 22.04, I am not getting any error but the comand dont replace the ip, I added the picture

pLumo

10/21/23, 8:45 AM

Please don't add pictures of text, rather copy paste the text and format as code please. Thanks :-)

HELLBOY

10/21/23, 8:47 AM

I add the results of the commands by your request :)

pLumo

10/21/23, 8:48 AM

Btw, easier to `grep` output from `ip` with `-o` flag: `ip -o add show | awk '$2=="ens160" && $3=="inet" {sub("/.*","",$4); print $4}'` ```

terdon

10/21/23, 1:37 PM

Please [edit] your question and provide (as text, not images) your input, and your desired output. We need to see `/etc/netplan/00-installer-config.yaml` so we can understand what `cat /etc/netplan/00-installer-config.yaml | grep - |head -n1 |tr -d "-" |awk -F / '{print $1}'` produces. Most likely it is the internal quotes that are breaking it, but we can't tell if you don't show us the input data.

HELLBOY

10/21/23, 2:54 PM

I am adding text

HELLBOY

10/21/23, 6:08 PM

Never mind found the problem needed to delete the space

Score:0

Ubuntu

glenn jackman

10/21/23, 8:09 PM

This will be a whole lot more readable if you don't jam everything into one line:

from=$(cat /etc/netplan/00-installer-config.yaml |grep - |head -n1 |tr -d "-" |awk -F / '{print $1}' |tr -d " " )
to=$(ip add show |grep ens160 |grep inet |awk '{print $2}' |awk -F / '{print $1}')

sed "s/$from/$to/g" /etc/netplan/00-installer-config.yaml

And awk itself can do what grep/head/tr can do:

from=$(
  awk '
    /-/ {                     # grep -
      gsub(/-/, "", $0)       # tr -d "-"
      split($0, a, "/")       # awk -F/ ...
      gsub(/ /, "", a[1])     # tr -d " "
      print a[1]
      exit                    # head -n1
    }
  ' /etc/netplan/00-installer-config.yaml
)

to=$(ip add show | awk '/ens160/ && /inet/ {split($2, a, "/"); print a[1]; exit}')

sed "s/$from/$to/g" /etc/netplan/00-installer-config.yaml

+ 0

Score:0

Ubuntu

HELLBOY

10/21/23, 6:09 PM

sed "s/$(cat /etc/netplan/00-installer-config.yaml |grep - |head -n1 |tr -d "-" |awk -F / '{print $1}' |tr -d " " )/$(ip add show |grep ens160 |grep inet |awk '{print $2}' |awk -F / '{print $1}')/g" /etc/netplan/00-installer-config.yaml

+ 1

Will

10/21/23, 7:31 PM

Perhaps add a bit of explanatory text?

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: SED- replace result at file with anther one

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