My files are of the format

Country, City S1.txt

e.g.

USA, Los Angeles S1.txt
USA, San Francisco S3.txt
UK, Glouchester S4.txt
Argentina, Buenos Aires S7.txt

I wish to change them to

Country_City_S1.txt

e.g.

USA_Los_Angeles_S1.txt
USA_San_Franciso_S3.txt
UK_Glouchester_S4.txt
Argentina_Buenos_Aires_S7.txt

To remove the comma I use the following sed command:

sed -i 's/,//g'

To replace the whitespaces with underscore, I use the following sed command:

sed -i 's/ /_/g'

Question: Is there a way to combine the above two commands into one? Or is there a neater way to accomplish the above?

Notes:

1. I have changed the title of my original post to better reflect what I need to be done. I am sorry for any confusion caused as a result of the change.

2. I understand now what I need, which is a bash script and not sed to change filenames.

3. I thank all those who have replied with their suggested sed commands.

4. I prefer to use the mv command in a bash script as in for example *for f in .txt; do mv .......; done

CodePudding user response：

Merge your two sed expressions:

sed 's/,//g; s/ /_/g'

CodePudding user response：

Replace any combination of spaces and commas with a single underscore:

sed -E 's/[, ] /_/g'

See live demo.

CodePudding user response：

This might work for you (GNU sed):

sed 's/,//g;y/ /_/' file

Remove commas and translate spaces to underscores.

Or perhaps:

sed -E s/,?  /_/g' file

To rename file names, perhaps:

sed -E 'h;s/,?  /g;H;g;s/(.*)\n(.*)/mv "\1" "\2"/e' <<<"$filename"