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add text in the middle of file
Can anyone help me pls? I want to add a text into the middle of file.
I've writtenthe following script text to add="$1" file="$2" lines=$(wc -l $2) half_lines=$(expr $lines / 2) head -$half_lines $2 > temp echo "text to add" >> temp ((half_lines=$half_lines + 1)) tail -$half_lines $2 >> temp mv temp $2 it gives me `expr : syntax error Can someone tell me what i did wrong. Was i not to use expr command? |
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Try this script
[[ -z $1 ]]&& echo "Argument needed "&& exit [[ ! -s $1 ]]&& echo "File not found "&& exit rm -f $1New var=`wc -l <$1` echo "Enter line no :\c" read lineno echo "Enter Text:\c" read text head -$lineno $1 >$1New echo "$text" >>$1New var1=$((var-lineno)) tail -$var1 $1 >>$1New |
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input: Code:
first second forth fifth output: Code:
first second third forth fifth Code:
line=`cat a | wc -l`
half=`expr $line / 2`
nawk -v s="$half" '{
if(NR<=s)
print
}' a
echo "third"
nawk -v s="$half" '{
if(NR>s)
print
}' filename
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