Sed

From Koset Surakomol

sed man page
sed one-liners

Contents 1 Change a string throughout a file 2 Multiple files 3 Insert text blob 4 Replace a space in a filename with an underscore 4.1 The following are kept for archival purposes. 4.2 or this

Change a string throughout a file

cat index.htm | sed -e s/\/body/\/BODY/g  index.htm.new

Multiple files

for i in * ; do
sed s/exp1/exp2/ $i  $i-new
mv $i-new $i;
done

or this ...

$ find . -type f | xargs grep -l 'foo' | xargs sed -i '' -e 's/foo/bar/g'

Insert text blob

E.g. inserting google analytics script into html files (UNTESTED)

for x in `ls *html`; do
sed /s\/body/r google $x  new/$x
done

Replace a space in a filename with an underscore

THIS script is the one that works the best. Original [1]

#!/bin/ksh
find `pwd` -name "* *"|while read file
do
target=`echo "$file"|tr -s ' '|tr ' ' '-'`
mv "$file" "$target"
done

The following are kept for archival purposes.

for i in *
do
  OLDNAME=$i
  NEWNAME=`echo $i | tr ' ' '_' | tr A-Z a-z | sed s/_-_/-/g`
  if [ $NEWNAME != $OLDNAME ]
  then
    TMPNAME=$i_TMP 
    echo 
    mv -v -- $OLDNAME $TMPNAME
    mv -v -- $TMPNAME $NEWNAME
  fi
  if [ -d $NEWNAME ] 
  then
    echo Recursing lowercase for directory $NEWNAME
    $0 $NEWNAME
  fi
done

source

or this

#!/bin/bash

ls | while read -r FILE
do
    mv -v $FILE `echo $FILE | tr ' ' '_' | tr -d '[{}(),\!]' | tr -d \' | tr '[A-Z]' '[a-z]' | sed 's/_-_/_/g'`
done