Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Join lines on a common field
Answer:
Suppose you have two files
file1.txt
john b
mark c
peter a
file2.txt
john 2
mark 3
peter 1
You can to join two files by the first column, to become
john b 2
mark c 3
peter a 1
It is easy with the join command
# join file1.txt file2.txt
Remark: You would need to sort the file and make each column an unique line first.
How to decompresses a gzipped file
Answer:
1. Use the gunzip command
# gunzip test.gz
1. Use the gzip command, and the -d flag
# gzip -d test.gz
Difference between more and less command
Answer:
Both the less and more help you to display the contents of a given file one screen at a time.
The differences:
If you are using modern Linux, you can always use less to replace more.
How to split a large file into multiple smaller files in Linux
Answer:
If you have a very large file and want to split into multiple smaller files, split command can do the job for you.
# split -l 10 text.txtThe above command split the file text.txt into a multiple files (xaa, xab, xac...), which contains at most 10 lines per file.
Convert UTF-16 encoded file to UTF-8
Answer:
iconv is what you need and is available on most Linux platforms.
# iconv -f UTF-16 -t UTF-8 text.txt
