my input:

ads bdsd cds dds
ac  cv ss    ds

dsd

output I expect:

ads
bdsd
cds
dds
ac
cv
ss
ds
dsd

command I used:

cat file1.txt | perl -p -i -e 's/\n(. )/$1/'

but it does not work

CodePudding user response：

Try this:

cat file1.txt | tr -s " " "\n"

Basically, it replaces spaces with newlines and removes empty lines.

CodePudding user response：

Try rq (https://github.com/fuyuncat/rquery/releases), use 'coltorow' convert columns to rows.

[ rquery]$ ./rq -q "p d/ /r | s coltorow(foreach(1,%,$)) | f trim(@raw)!=''" samples/mulcoltorow.txt
ads
bdsd
cds
dds
ac
cv
ss
ds
dsd