Hello everyone,

In one of my shell script I am doing sed/replace using a variable to find a string in a file & replace it with another string in same file.

The challenge which I am facing is that, the variable which I am using with "sed" is having one of character as

Code:

"/"

Here is below how I am using the same,

Firstly, I am parsing "fdisk -l" output so that I will get the output in below format & assiging it to variable as below,

Code:

NewDisk=`fdisk -l | grep LINUX | egrep -v '\*|LVM' | awk '{print $1}' | sed 's/\/dev\///'`

With above command the variable

Code:

$NewDisk

getting assigned value

Code:

csicc/c0d0p5

Now, I am doing sed/replace as below,

Code:

sed -i "s/^cdrom/harddrive --partition=${NewDisk} --dir=\//" FILENAME.txt

However this command is failing, I guess because the variable

Code:

$NewDisk

contains "/" & which need to be escaped somehow, which I don't know how to do it.

I tried various options but no luck, every time it is failing with below error,

Code:

sed: -e expression #1, char 38: unknown option to 's`

Even I tried to add escape before "/" as below,

Code:

fdisk -l | grep LINUX | egrep -v '\*|LVM' | awk '{print $1}' | sed 's/\/dev\///' | sed "s/\//\\\//g"

when I run above command, on command line it works fine & display output as

Code:

csicc\/c0d0p5

, but it fails with above error when I try to get this in variable.

Please suggest me how to fix this.

Regards,
Uday