Ref: Optimizing Linux® Performance: A Hands-On Guide to Linux® Performance Tools Ref:http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/admin-primer/s1-resource-what-to-monitor.html Ref:http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/admin-primer/s1-resource-rhlspec.html Basic explanation of memory related words: Swap (Not Enough Physical Memory) All systems have a fixed amount of physical memory in the form of RAM chips. The Linux kernel allows applications to run even if they require more memory than available with [...]
Archive for March, 2010
Linux-Memory Performance statistics
Wednesday, March 31st, 2010529/Failure Audit(MICROSOFT_AUTHENTICATION_PACKAGE_V1_0)
Monday, March 29th, 2010Ref: http://www.winvistatips.com/security-log-eventid-529-smtp-t673781.html Ref: http://www.pcreview.co.uk/forums/thread-1596278.php Bad guys are trying to authenticate server via port 25. How to reproduce this log: # Type telnet 25,and then press ENTER. # Type EHLO , and then press ENTER. # Type AUTH LOGIN. The server responds with an encrypted prompt for your user name. # Enter your user name encrypted [...]
how to configure logrotate for apache log files
Wednesday, March 24th, 2010Problem : When you install apache from source , by default logrotate will not rotate those logs file as the path for log files are different. Solution: You can edit httpd file under /etc/logrotate.d/ directory and insert bellow lines /usr/local/apache/logs/*log { missingok notifempty sharedscripts postrotate /usr/local/apache/bin/apachectl graceful > /dev/null 2>/dev/null || true endscript } Now [...]
Linux:How to use aide to check file system integrity
Monday, March 15th, 2010Installing Aide: Yum install aide Creating the database: aide -c /etc/aide.conf –i Output : AIDE database at /var/lib/aide/aide.db.new.gz initialized. This process creates a new file, aide.db.new.gz in /var/lib/aide/.You must rename this file to aide.db.gz, which is the correct name for the AIDE database. Testing Aide: aide -c /etc/aide.conf –C
Cisco:Basic commands to setup a cisco router
Wednesday, March 10th, 2010How to lock the privilege mode : enable configure terminal enable secret cisco How to secure vty ? enable configure terminal line vty 0 15 [ for help type line vty ? ] login password cisco How to secure console port? enable configure terminal line con 0 login password cisco How to secure the aux [...]