Replace new line with ||

Question

I have a file with several thousand lines. I'm looking to replace newline character with || (that is <space>||<space>)

I'm wanting to this via bash on Ubuntu 20.04

I've tried the following but in vain -

tr '\n' ' || ' < input.txt
tr '\n' ' \|| ' < input.txt
tr '\n' ' \|\| ' < input.txt

I'm not able to work out what I'm doing wrong. Please can someone help me spot my mistake?

Please add sample input (no descriptions, no images, no links) and your desired output for that sample input to your question (no comment). — Cyrus, Dec 02 '21 at 23:26
See: [How to replace one character with two characters using tr](https://stackoverflow.com/q/18365482/3776858) — Cyrus, Dec 02 '21 at 23:34
Does this answer your question? [How to replace one character with two characters using tr](https://stackoverflow.com/questions/18365482/how-to-replace-one-character-with-two-characters-using-tr) — phuclv, Dec 03 '21 at 03:47

score 0 · Accepted Answer · answered Dec 02 '21 at 23:27

0

Actually, just after posting this question, I worked this out. Leaving the answer here if someone someday finds it helpful

perl -p -e 's/\n/ || / ' input.txt

answered Dec 02 '21 at 23:27

usert4jju7

2

Or with GNU sed: `sed -z 's/\n/ || /g' input.txt` – Cyrus Dec 02 '21 at 23:28
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Or `awk 1 ORS='||' input.txt` – Fravadona Dec 02 '21 at 23:33
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The only problem with all these solution is that you'll most probably get an `||` at the end of the file; it may be want you want though – Fravadona Dec 02 '21 at 23:35
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@Fravadona: This could be addressed in this way with GNU sed: `sed -z 's/\n/ || /g; s/ || $/\n/' input.txt` – Cyrus Dec 03 '21 at 00:02
Thank you everyone for the wonderful alternates. – usert4jju7 Dec 04 '21 at 09:54

1 Answers1