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#netstat -na | grep LISTEN | grep 80

tcp6 0 0 :::80 :::* LISTEN


Do you have an IPv6 address allocated? What do you get as output for ip a s ?...

I am running apache 2 on centos 7 which is running ipv4 , now I would like to enable it to support ipv6 , would advise what I need to change to Adding IPv6 support to the server ? or nothing need to...

I have a physical machine , just use vmware tools migrated data to virtual machine .

how can I check these two servers - old and new server , the data are the same , all files are copy to new...

thank reply ,

I changed the code to as below

while read d1
do while read d2
do while read d3
do while read d4
do while read d5
do echo "abc"
done < f5
done < f4
done < f3
done < f2...

thanks reply ,

when run it , it pops the error "syntax error near unexpected token `done'
" .

besides , instead , add d1 , d2 , d3 .... , how to loop it to 1000 ?

thanks

thanks for your help

Is this a homework assignment? ==> this is not homework assignment .
Is my_string a constant, or is it a parameter to your script? ==> my_string is a constant
What have...

I have a file , the file content will be modified regularly , its structure as below, the lines are begins with "A" and "B" .

#vi file1

this is testing file
A aaaaa
B bbbbb
A ccccc ...

deleted

deleted

I know the command "mailq" can be used to check any mail is pending , if I would like to get the alert if the no. of pending mail is over 500 , would advise what can I do , if a script can do that ?...

thanks reply ,
the above script is check remote server log , it seem check 1 server only , right ?
if I want to access 10 servers to check its log , would advise how to do it ? thanks

thanks reply ,

it helps , I will finish the script myself , but if I have 10 servers , rather receive 10 alert mails , how to make 10 mails becomes one single mail , all servers can be connected...

I would like to write a script to check the log , if any line in the log have the string in include_list.txt but do not have the string in exclude_list.txt , then send alert mail to administrator ,...

thanks reply ,

it helps , I know the command "mailq" can show all pending mail , what I hope to do is extract such raw data into a alert mail .

thanks

thanks suggestions

mails stopped in the mailq usually because the particular mail domain error or mail relay problem , it do not cause the mail completely can't send out .
therefore , I think...

thanks reply ,

would you please ignore the probability of server failure .

thanks

thanks reply ,

the email will send to my mobile phone , and my email system is very stable , it nearly 99.99% availability .

We use Redhat server , we always use mailq to check any pending mail in mailq , when run the command mailq , it shows all existing pending mail would advise how to write a script to show the...

Thanks reply,

I am not want to know the reason of failure to send mail and how to fix the error , I just would like to know how many mail is in the mqueue in a time .

is there script could do...

thanks reply,
yes , there are remote server , but I prefer use localhost to do the checking.

I know the command mailq can check the pending mail in mqueue , and also have another command to check POSIX mail queue in server , now I will regularly check the mqueue manually , it is time...

thanks reply ,

if use this method , it only check the size of /home directory but not the individual directory size of each user , is it ? thanks

I would like to check the used size of all user login ID , I tried the command du -a , du -h , it seems can only find the current directory , If I would like to list all user ( the user list in...

Hi, I just would like to write a perl script , this perl script do the following .

Check the parameter $data in a mysql database ( with user ID and password ) , if the $data is exist then return...

I would like to make a perl function , this function could send mail via SMTP and also could import a text file into mail content , that mean I have a text file , want to use this function to send...

thanks reply ,

I mean I have existing perl program tht output email address and content to the variable , it can not do send mail , what I need is add a function to send mail via SMTP .