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Supposed you only show $5 it is
awk '{gsub(",", "", $5); sum+=$5} END{print sum}' mylogfile.logThe gsub() returns the number of performed substitutions, not the result string. The result is stored...

Happy Holidays.

Here are my randoms thought at the end of 2018 in no particular order.

You Are Truly Blessed

IT people are lucky. We get to use our brains extensively to solve complex and...

Hello krishmaths,

Could you please try and let me know if this helps you. Let's say following is the Input_file.

cat Input_file
A~B CDR~rsbkjdewdj @!!!~deiiugewiuewn
Then following is the...

Hello krishmaths,

As you haven't shown us the complete requirement here so little difficult to say how you wanted to use these 50 variables. But wanted to highlight here for these kind of...

This may open other holes if not done carefully however (who is allowed to create files there?)

Make a logic inside your script if a certain user touches a file in $SOMEDIR/stop.file the process you started will stop looping and exit gracefully.

This way you can avoid sudo and privilege...

Its not that easy ( doing something simple...), normally you would lauch that sort of stuff using a share account that is not personnel, local to that box that the ones who can use it have the...

The for-in-loop should not be used. The OP wants to preserve the order of the list, buti in a is not guaranteed to preserve order.

awk '{sum+=$2; a[NR]=$1} END{for (i=1; i<=NR; i++) {print...

Maybe i can clear this up:

Originally, UNIX commands had only one-character options, some of which could take an argument. The options were introduced with a dash ("-") to distinguish them from...

Almost nobody has dos2unix, but tr -d '\r' < inputfile > fixedfile will work anywhere.

Yes and no. I think you are missing the point, though. Programs are read like onions, peeling layers of loops off. Anyway, the script is poorly written and you should understand that, as we go along....

so what's the reason to set another array b?
awk '{a[$0]++} END{for(i in a){if (a[i]==1) {print i}}}' infile

@krishmaths:
test wants = not ==
And the variable preset can happen once when placed just before the loop
yes="n"
until [ "$yes" = "y" ]

awk '
/pattern/ {print a}
{a=$0}'

Running on a file:
Line1: Does it contain "pattern", yes print a (here a will be empty), no continue
a=Line1
Line2: Does it contain "pattern",...

Your analysis is incorrect.

-name only matches against a file's name (the basename of a multi-component pathname). There are two characters that are forbidden in UNIX filenames: / (which is...

I know that you asked for a sed solution, but ed is well suited to something like this and only needs to be invoked once to do it. This was tested using a Korn shell, but will work with any shell...

First:
No need to cat the file to awk
correct awk '{print }1' file
This will print every line two times.

awk has this format
test {action}
this can be repeated
test {action} test {action}...

Thanks that is good to know. I did some more tests with several versions of awk on various platforms:
awk -F"|#|" '{print $2}' file
Indeed it works on AIX. It also works with /usr/xpg4/bin/awk on...

Find will accept multiple pattern in below way


find . -name "*log.gz" -o -name "*txt.gz"

$ echo Jun | awk ' { printf("%02d",int(index("JanFebMarAprMayJunJulAugSepOctNovDec",$1)/3)+1) } '
06

I believe awk does support length function..

try

function calcmaxlen
{
awk -v POS="$1" '{if(length($POS)>max){max=length($POS)}}END{print max}' $HOME/input.dat
}

echo $1 |egrep '^(Jan|Feb|Mar|Apr|may|Jun|Jul|Aug|Sep|Oct|Nov|Dec)$' || echo "Invalid Month entered";

If your shell is halfway current, this should work without calling external commands:


if [[ $1 != @(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) ]]
then
echo "Invalid input. Should be...

If you login to a local terminal, you talk to /bin/login, if you login with sshd it goes its own way, but these days everything talks to the same login system -- pam. (pluggable authentication...

I believe there are few changes needed. This will definitely get into a infinite loop due to highlighted lines :)

May be you have to set a variable for the next second ;)