Shell Script - how to replace first line string with empty string?

Question

I would like to replace first line with empty string in shell script?

For example:

Input

Skipping HTTPS certificate checks altogether. Note that this is not secure at all. 
Line 2 ......
Line 3 ......

Output

Line2
Line3

What Unix command I can use to perform same? Any Idea?

Looks like that first line is there for a reason! Anyway, do you want to delete the contents of the line or remove it altogether? What have you tried here and where are you stuck? — Tom Fenech
– Tom Fenech, Commented Jul 21, 2015 at 9:44

Shravan Yadav · Accepted Answer · 2015-07-21 10:26:31Z

2

you can use below also

yourcommand | awk 'NR>1'

or

yourcommand | tail -n+2

answered Jul 21, 2015 at 10:26

Shravan Yadav

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2 Comments

Shravan Yadav Over a year ago

Is there any problem in #1? Let me know the issue. I will correct it.

Narendra Verma Over a year ago

I didn't try first one. I just used second one.

Florian Ldt · Accepted Answer · 2015-07-21 09:28:14Z

1

if it's in a file, you can use this to delete the first line :

sed -i '1d' ../file.txt

answered Jul 21, 2015 at 9:28

Florian Ldt

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1 Comment

Narendra Verma Over a year ago

Thanks for the response. Actually I was looking to apply it on string which is returned by command.

user1934428 · Accepted Answer · 2015-07-23 10:05:10Z

0

Do you mean, that you want Output to be basically equal to Input, but the first line being delted? This is is done with the Unix command 'tail'.

From the man page of tail:

    -n, --lines=K
          output the last K lines, instead of the last 10; or use -n +K to output starting with
          the Kth

edited Jul 23, 2015 at 10:05

answered Jul 21, 2015 at 10:13

user1934428

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7 Comments

Narendra Verma Over a year ago

My input is coming from another command and I want to delete first line from that input.

fedorqui Over a year ago

this is more a comment than an answer

fedorqui Over a year ago

Many things: answer normally explain how to do something and then do it, eventually showing some kind of output. This just a comment about how to do it.

fedorqui Over a year ago

I think it is best to provide a complete answer. Otherwise many questions could be answered with a mere "check man -command-"

fedorqui Over a year ago

This is a true point. Note that many questions become closed exctly because of that. See How to Ask for more info. Then, as a good question can be "assumed", a good answer can come. Interesting infos: Why and how are some answers deleted? and How do I write a good answer?. Happy experience in SO!

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