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Functions

Print just line 4 from a textfile

Terminal - Print just line 4 from a textfile
sed -n '4p'
2010-07-08 22:07:40
User: infinull
Functions: sed
12
Print just line 4 from a textfile

this method should be the fastest

Alternatives

There are 7 alternatives - vote for the best!

Terminal - Alternatives
sed -n '4{p;q}'
awk 'NR==4'
head -n X | tail -n 1
2010-07-08 22:06:39
User: infinull
Functions: head tail
-1

using tail first won't do it because tail counts from the bottom of the file. You could do it this way but I don't suggest it

sed '4!d'
2011-09-05 17:54:57
User: totti
Functions: sed
-1

d --> delete

!d ---> delete others

perl -ne '$. == 4 && print && exit'
2011-09-05 21:52:16
User: bashrc
Functions: perl
-1

Perl version - just for completeness sake ;)

Know a better way?

If you can do better, submit your command here.

What others think

If it's a long file, then it's quicker to add a 'quit' command:

(otherwise sed will read the rest of the file)

sed -n '4{p;q}' text
Comment by flatcap 384 weeks and 5 days ago

i think another way to achieve this, if one is also doing manipulations on line 4 (and thus can't use -n) is:

sed '4q;1,3d' text

sed 's/old/new/;4q;1,3d' text

please correct me if i'm wrong.

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Comment by xukaimin 10 weeks and 2 days ago

Your point of view

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