How to remove word from string in shell script

Question

I want to remove a specific word from string in shell script.

My text file contains below data

***** Failed tests *****
Devices                  Class                Test
Nexus_5_29_2(AVD) - 10   Addition             productCalculation

I want to remove Devices and Nexus_5_29_2(AVD) - 10

Nexus_5_29_2(AVD) - 10 is not constant it may change to Nexus_5_29_1(AVD) - 10 or Nexus_5_29(AVD) - 10

Expected output is

***** Failed tests *****
Class                Test
Addition             productCalculation

how can i achive this? awk is preferable

Answer 1

Use sed for replace or search and delete

sed -i -e 's/Devices//g' filename.txt

Awk solution:

cat filename.txt | awk '{print  $2 $3 }'

To do as you want, I need more information.

Answer 2

This might work for you (GNU sed):

sed -E '/^Devices/{N;s/^\S+\s+(.*\n)Nexus_5_29(_[0-9]+)?\(AVD\) - 10\s+/\1/};P;D' file

If a line begins Devices append the next line and remove the first column and its associated whitespace of the those two lines if the second line matches the required string.

NB The appended line may not match the criteria for the second line, in which case the first line should be printed as normal and the process repeated with the second line taking its place, hence the reason for P and D commands. All other lines will be printed as normal.

From the criteria you described, the above solution may well be suffice. If, however a more generic solution is needed, perhaps?:

sed -E '/^Devices/{N;s/^\S+\s+(.*\n)\w+_[0-9]+_[0-9]+(_[0-9]+)?\([A-Z]{3}\) - [0-9]+\s+/\1/};P;D' file

Answer 3

Assuming that your file has only spaces and no tabs, you can delete the first n characters for the rows except the header.

> awk 'NR>1 {$0=substr($0,26)} 1' file
***** Failed tests *****
Class                Test
Addition             productCalculation

Answer 4

find the position of the second header in second line and trim left side.

$ awk 'NR==2{n=match($0,/ [^ ]/)} {print substr($0,n+1)}' file

***** Failed tests *****
Class                Test
Addition             productCalculation

Assumes headers are one word each (without spaces).