zazzybob.com

I recently modified /etc/resolv.conf on all of my global zones after building new nameservers. I wanted a quick way to copy this updated configuration to all child zones. A simple one-liner does the trick on each global zone (assuming all your zones are in the /var/zones zonepath):

# zoneadm list | grep -v global | while read zone; do cp -p /etc/resolv.conf /var/zones/${zone}/root/etc; done

Cheers,
Kevin

It’s easy to telnet to port 80 on a “standard” non-SSL webserver, and issue a GET / in order to verify that the webserver is responding correctly. But how to do it over SSL? Just use the s_client command via the openssl tool

# openssl s_client -connect www.example.com:443

You’ll see details of the certificate chain displayed (as well as any errors), and you can then issue your GET / to test the webservers operation.

You can also use this tool to test other SSL-enabled services (such as IMAPS/POP3S).

Cheers,
Kevin

The following simple one liner will do the trick:

# mailq | grep MAILER-DAEMON | awk '{print $1}' | sed 's/\*//' | postsuper -d -

Cheers,
Kevin

Another OpenSSL related tip.

If you’ve ever wanted to generate a hashed password suitable for inclusion in the /etc/shadow file (for example, during post-install procedures such as sysidcfg), you can use the openssl passwd command

$ openssl passwd
Password:
Verifying - Password:
HaShEdPaSsCoMeSoUt

Cheers,
Kevin

When you build Perl modules under Solaris, they are optimised for Sun Studio, which of course, we all use :/

So, if you build with gcc, the build will likely fail.

You can use the following magical one-liner to fix this brain damage, and your modules will build correctly.

# pwd
/usr/local/src/cpan/Some-PerlMod-0.123
# find . -name "Makefile" | while read MAKEFILE; do
>   sed 's/^CC = cc$/CC = gcc/' ${MAKEFILE} > ${MAKEFILE}.tmp
>   sed 's/^LD = cc$/LD = gcc/' ${MAKEFILE}.tmp > ${MAKEFILE}
>   sed 's/^CCCDLFLAGS = -KPIC$/CCCDLFLAGS = -fPIC/' ${MAKEFILE} > ${MAKEFILE}.tmp
>   sed 's/OPTIMIZE = -xO3 -xspace -xildoff$/OPTIMIZE =/' ${MAKEFILE}.tmp > ${MAKEFILE}
>   sed 's/ -xarch=v8//' ${MAKEFILE} > ${MAKEFILE}.tmp && mv ${MAKEFILE}.tmp ${MAKEFILE}
> done

Cheers,
Kevin

I wanted to remove a large number of files from a directory. However, I did not want to descend into subdirectories, nor did I want to remove any .pdf or .chm files. Some of the files had non-standard characters (such as quotes and spaces) in them.

The solution? A simple one liner using find and xargs

$ find . \( ! -name "*.pdf" -a ! -name "*.chm" \) -maxdepth 1 -type f -print0 | xargs -0 rm

Cheers,
Kevin

Simple one liner to remove empty files older than 7 days

# find . -type f -mtime +7 -ls | awk '$7 == 0 { print $NF }' | xargs rm

Cheers,
Kevin