Show certain lines by line number: Difference between revisions
Created page with "Show certain lines by line number of string file == Testing text file == <pre> echo "line 1" > test.txt echo "line 2" >> test.txt echo "line 3" >> test.txt echo "line 4" >> t..." |
m Text replacement - "Category:Text file processing" to "Category:String manipulation" |
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Show certain lines by line number of string file | Show certain lines by line number of string file | ||
== | == Prepare the testing text file == | ||
<pre> | <pre> | ||
echo "line 1" > test.txt | echo "line 1" > test.txt | ||
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echo "line 5" >> test.txt | echo "line 5" >> test.txt | ||
echo "line 6" >> test.txt | echo "line 6" >> test.txt | ||
</pre> | |||
key-in the command {{kbd | key=cat test.txt}} to view the file content | |||
<pre> | |||
line 1 | |||
line 2 | |||
line 3 | |||
line 4 | |||
line 5 | |||
line 6 | |||
</pre> | </pre> | ||
== Approaches == | == Approaches == | ||
=== Using cat, head & tail commands === | === Approach 1: Using cat, head & tail commands === | ||
1. key-in the command<ref>[https://unix.stackexchange.com/questions/288521/with-the-linux-cat-command-how-do-i-show-only-certain-lines-by-number text processing - With the Linux "cat" command, how do I show only certain lines by number - Unix & Linux Stack Exchange]</ref> | 1. key-in the command<ref>[https://unix.stackexchange.com/questions/288521/with-the-linux-cat-command-how-do-i-show-only-certain-lines-by-number text processing - With the Linux "cat" command, how do I show only certain lines by number - Unix & Linux Stack Exchange]</ref> | ||
<pre> | <pre> | ||
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</pre> | </pre> | ||
=== Using sed command === | === Approach 2: Using sed command === | ||
key-in the command<ref>[https://www.gnu.org/software/sed/manual/sed.html#Common-Commands sed, a stream editor]</ref> | key-in the command<ref>[https://www.gnu.org/software/sed/manual/sed.html#Common-Commands sed, a stream editor]</ref> | ||
<pre> | <pre> | ||
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[[Category:Linux]] | [[Category:Linux]] | ||
[[Category:Data Science]] | [[Category:Data Science]] | ||
[[Category: | [[Category:String manipulation]] | ||