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awk '{printf("%.1f %s\n", 0.4*(NR-1), $0)}' infile

Cool, you just changed the output record separator accordingly.
I am just using the tools, while you are playing with the tools.
That was amazing!

With awk, you can use:
awk '{if(a!=""){a=a "\t" $0}else{a=$0}} NR%12 == 0{print a; a=""}' infile

With perl, the code is a little bit more verbose.
perl -le 'while(<>){chomp;...

This is really easy, use:
find /home/*/public_html -name uploads -prune -o -name albums -prune -o -name "*.php" -print

I didn't test the command, but it should be something like that.

The most useful info for people here to help you is input and desired output, otherwise it will take a long time for people to figure out what exactly you want before they start thinking of a...

awk 'BEGIN{OFS="\t"}
NR == FNR{a[$0]; next}
FNR == 1{ for(i=1;i<=NF;++i){if($i in a){a[$i]=i}} for(e in a){printf e OFS} printf ORS; next}
{for(i in a){printf $a[i] OFS} printf ORS}'...

For detecting the server crash, you need some info from which to tell that, maybe from a log file generated by the JBoss server, you can setup a cron job to grep the log file regularly. After that,...

awk 'NR>=3 && /red/' infile

I assume the first row is the current date.
awk 'BEGIN{"date +%m%d%Y" | getline first; print "1|" first} {if(NR>1){print "2|"$0}else{print "1|"$0} ++c}END{print "3|"c}' infile

You need to elaborate on how your file names look like, how the directories to which you want to put your files look like.

Otherwise, I can only come up with the following:
for file in `ls -1`;...

perl:

It is most likely that your HTML file has special characters you should escape for mysql, like single-quotes, try escaping them by replacing each single-quote with triple-quotes.

sed -i '$ i\<user username="'$user'" password="'$pword'" roles="'$roles'" />' input.txt

When $(last line) is used, </tomcat-users> is assumed to appear at the end of the file. and i that follows...

You don't need to match the blank lines
sed -n '/^11111$/,/^33333$/p' infile

If this is not what you want, post your real data and desired output.

sed -n '1,4p' infile

I have no idea what that box type character is, it doesn't look like a newline character though.

You can use dump or xxd and find the hex representation of that character:
head -1 your_file |...

You would likely use Regex rather than Wildcard when searching text in a file.
And 82M is far from being big enough and called a huge file.

awk 'NR==FNR{a[$0]; next}$0 in a{++c}END{print c}' file1 file2

Yea, you can use sed:
sed 's/$/\r/' infile > dos.txt

BTW, when you use unix2dos, you don't do unix2dos file1.txt > file2.txt
you simply do
unix2dos file1.txt

unix2dos converts your files in...

The preceding script can be rewritten a little verbosely as the following:
awk -F, '$1=="ABC"&&($2=="XYZ"||$2=="DEF") {$6="This is a valid record"}1{print}' OFS="," infile
or
awk -F,...

This question has been answered for many many times.
https://www.unix.com/shell-programming-scripting/49369-replace-value-variable-using-sed.html...

# this command changes all 0x0a to 0x0d0a in your_file
unix2dos your_file

You probably need unix2dos and dos2unix.
Windows uses 0x0d0a as newline, while Unix uses 0x0a.

I think Using the i(insert) command would be more straightforward in this case.

---------- Post updated at 01:16 AM ---------- Previous update was at 01:15 AM ----------

sed -i '$ i\<user...