/Shell/Bash/Replace a newline using sed linux bash

Replace a newline using sed linux bash

$ echo 'foo
bar
baz

foo2
bar2
baz2' \
| tr '\n' '\000' \
| sed 's:\x00\x00.*:\n:g' \
| tr '\000' '\n'

Source: stackoverflow.com

Replace a newline using sed linux bash

sed ':a;N;$!ba;s/\n/ /g' file

:a create a label 'a'
N append the next line to the pattern space
$! if not the last line, ba branch (go to) label 'a'
s substitute, /\n/ regex for new line, / / by a space, /g global match (as many times as it can)

Source: stackoverflow.com

Replace a newline using sed linux bash

#All alternatives, unlike sed will not need to reach the last line to begin the process

#with bash, slow
while read line; do printf "%s" "$line "; done < file

#with perl, sed-like speed
perl -p -e 's/\n/ /' file

#with tr, faster than sed, can replace by one character only
tr '\n' ' ' < file

#with paste, tr-like speed, can replace by one character only
paste -s -d ' ' file

#with awk, tr-like speed
awk 1 ORS=' ' file

#Other alternative like "echo $(< file)" is slow, works only on small files and needs to process the whole file to begin the process.

Source: stackoverflow.com

Replace a newline using sed linux bash

# sed is intended to be used on line-based input. Although it can do what you need.
#A better option here is to use the tr command as follows:
tr '\n' ' ' < input_filename

#or remove the newline characters entirely:
tr -d '\n' < input.txt > output.txt

#or if you have the GNU version (with its long options)
tr --delete '\n' < input.txt > output.txt

Source: stackoverflow.com

Similar codes

1 vote176 views1 answer
Busybox
Shell/Bash
0 vote199 views1 answer
Git ignore folder except one file
Shell/Bash
0 vote201 views1 answer
Get branch from origin
Shell/Bash
0 vote207 views1 answer
Break a symbolic link in linux
Shell/Bash
1 vote196 views1 answer
Powershell get folder size
Shell/Bash
1 vote236 views2 answers
Install seaborn in anaconda
Shell/Bash
0 vote192 views1 answer
Install terminus in ubuntu
Shell/Bash
22 votes187 views4 answers
Cmd listening ports
Shell/Bash
6 votes190 views3 answers
Git blame
Shell/Bash
11 votes204 views4 answers
Git push to heroku
Shell/Bash