i have a file which contains several instances of \\n .
i would like to replace them with actual newlines, but sed doesn't recognize the \\n .
i tried
sed -r -e 's/\n/\n/'
sed -r -e 's/\\n/\n/'
sed -r -e 's/[\n]/\n/'
and many other ways of escaping it.
is sed able to recognize a literal \\n ? if so, how?
is there another program that can read the file interpreting the \\n 's as real newlines?
你可以试试这个吗
sed -i 's/\\n/\n/g' input_filename
$ echo "\n" | sed -e 's/[\\][n]/hello/'
awk
seems to handle this fine:
echo "test \n more data" | awk '{sub(/\\n/,"**")}1'
test ** more data
Here you need to escape the \\
using \\\\
1) sed work 1 line ata time son no \\n on 1 line only (it's removed by sed at read time into buffer). You should use N,n or H, h to fill the buffer with more than 1 line, and than \\n appear inside. Be carreful, ^ and $ are no more end of line but end of string/buffer so \\n are inside. 2) \\n is recognize in search pattern, not in replace pattern. 2 ways for using it (sample)
sed s/\(\n\)bla/\1blabla\1/
sed s/\nbla/\
blabla\
/
first use a \\n already inside as back reference (smaller line in replace pattern) second use a real new line
so basicaly
sed "N
$ s/\(\n\)/\1/g
"
work (but is a bit useless). I imagine that s/\\(\\n\\)\\n/\\1/g
is more what you want
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