how to attach files to email in UNIX in shell scripts or command line

Use below command to send the files as attachment in Email. doing this also helps you to zip the files and email. also this reduces the email size too.
as we all know we send logfiles

Linux:-

echo body_text_you_want | mailx -a file_name.zip -s "Subject_line_you  want to specify" abcef@domain.com

for AIX:-

to attach a file

(echo "Subject:Test email\nTo:adbcef@domain.com\nFrom: adbcef@domain.com\n\nAttached log file";uuencode file_name file_name) |  /usr/sbin/sendmail abced@domain.com

to attach multiple files....

(echo "Subject:Test email\nTo:adbcef@domain.com\nFrom: adbcef@domain.com\n\nAttached log file";(uuencode file_name file_name; uuencode file_name_2 file_name_2)) |  /usr/sbin/sendmail abced@domain.com

Hope this helps.