Linux command with sed and awk date data format conversion implemented for example

When work needs to be converted by the type encountered date or time type of data format, the question is as follows:

file1.txt file date data type there several columns, as follows

1999/03/25

2000/04/01

2008/05/28

To date data format now file1.txt file into the following form

1999－03－25

2000－04－01

2008－05－28

Now, respectively, to achieve this conversion with sed and awk commands in linux

1. Use sed command

sed "s/\/-/g" file1.txt > file2.txt

2. Use the awk command

awk -F"/" '{OFS="-";print $1,$2,$3}' > file2.txt

Use two commands are very easy to implement this conversion, but sed looks more professional and concise.

Powerful bar, pro!