1. Check .p12 / .pfx certificate expiration date:
openssl pkcs12 -in testuser1.pfx -nokeys | openssl x509 -noout -enddate
To specify password in plain text, add -passin pass:”${pass}”
2. Export key and cert from .p12 / .pfx:
openssl pkcs12 -clcerts -nokeys -in myContainer.p12 -out usercert.pem openssl pkcs12 -nocerts -in myContainer.p12 -out userkey.pem
3. Connect to HTTPS server with client certificate:
openssl s_client -connect gmail.com:443 -cert usercert.pem -key userkey.pem
After migrating Current website to Debian 6, PHP calls exec and system stopped working.
The reason for it is debian package dash which modifies behaviour of system default shell:
# ls -l /bin/sh lrwxrwxrwx 1 root root 4 Dec 9 20:25 /bin/sh -> dash
To revert this this behaviour to standard, execute
# dpkg-reconfigure dash
Select “No” and default shell will be changed to standard bash.
You can check it with following command:
# ls -l /bin/sh lrwxrwxrwx 1 root root 4 Dec 9 20:26 /bin/sh -> bash
To add or substract any amount of seconds, minutes, hours, days, weeks, months or years to/from current date use the Linux date command:
date -d '+2 hour'
If you want to use specific date as a base:
date -d '2010-01-01 + 2 year'
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