Introduction One of the most commonly seen questions when dealing with firewalls and other Internet connectivity issues is the difference between active and passive FTP(File Transfer Protocol) and how best to support either or both of them. Hopefully, the following text will help to clear up some of the confusion over how to support FTP in a firewalled environment. This post includes examples of both active and passive command line FTP sessions. These session examples should help make things … [Read more...] about Active FTP vs. Passive FTP
Solaris
How to save sar reports longer than 7 days in Solaris
It might be necessary to save sar reports longer than 7 days. This post explains the steps to achieve this goal. The "sa2" is the script that is responsible for writing a summarized daily activity report. The /usr/lib/sa/sa2 has the following entries: #!/sbin/sh # Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T # All Rights Reserved # THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T # The copyright notice above does not evidence any # actual or intended publication of such source … [Read more...] about How to save sar reports longer than 7 days in Solaris
How to set up cron for automatic data collection from the system activity reporter (SAR) in Solaris 10 and 11
This post outlines steps to set up a cron job for automatic data collection from system activity reporter (aka SAR). Prior to Solaris 10 1. Become the superuser. 2. Edit the following file: # vi /etc/init.d/perf 3. Uncomment the following lines (remove the # sign from the beginning of each line): #if [ -z "$_INIT_RUN_LEVEL" ]; then # set -- `/usr/bin/who -r` # _INIT_RUN_LEVEL="$7" # _INIT_RUN_NPREV="$8" # _INIT_PREV_LEVEL="$9" #fi # #if [ … [Read more...] about How to set up cron for automatic data collection from the system activity reporter (SAR) in Solaris 10 and 11
GUDS – A Script for Gathering Solaris Performance Data
Whats is GUDS? The GUDS script is a ksh script designed to collect the data needed to analyze performance issues. The script collects a specific set of files and runs a series of operating system utilities, the selection of which are based on the specified level. The duration, number of iterations, and other variables are provided to the script either as a set of command line arguments or are prompted for input in interactive mode. The collected data is then packaged and compressed in a … [Read more...] about GUDS – A Script for Gathering Solaris Performance Data
How to make telnet listen to a different port in Solaris
For security purpose, you may want telnet bind to a different port instead of the well-known port 23. It should be noted that changing port numbers of well-known services is also usually a bad idea. In general, services should either be left with their default ports or completely disabled. Changing the default port should only be opted as last option when you want to keep the service as enabled. Follow the steps below to change the telnet port from 23 to 24. 1. Check if nay other service … [Read more...] about How to make telnet listen to a different port in Solaris
How to Enable ssh/sshd Debugging for Solaris
This post will show how to put ssh (the client command) and sshd (the server daemon) into debug mode in order to troubleshoot authorization and connection problems. This debug output will be requested by Oracle/Sun technical support agents for ssh/sshd authorization and connection issues when opening service requests. Steps to Follow Configure the sshd daemon to run single threaded in debug mode. You have the choice of either: 1. stopping the active sshd on the system so that an sshd … [Read more...] about How to Enable ssh/sshd Debugging for Solaris
Solaris : Non-root user can’t run prtdiag command
The Problem Non-root user can't run prtdiag command, but it works for root user # /usr/sbin/prtdiag picl_initialize failed: Daemon not responding The Solution The issue is caused by wrong permission of file /var/run/picld_door or directory /var/run. Set the permission of file /var/run/picld_door or directory /var/run as follow: # ls -l /var/run/picld_door dr--r--r-- 1 root root 0 Nov 10 14:21 /var/run/picld_door # ls -ld /var/run drwxr-xr-x 6 root sys 1261 Nov 10 14:21 … [Read more...] about Solaris : Non-root user can’t run prtdiag command
Howto Verify If a Bootblk is Installed on the Boot Disk (SPARC)
This can be useful in troubleshooting if the system fails to boot with a suspected bootblk issues, or if you suspect something in the OS keeps overwriting the bootblk. For Solaris 10 Below is the output from a Solaris 10u4 with UFS, Solaris 10u6 with UFS, and a Solaris 10u6 with ZFS bootblock. The bootblk version changed from s10u6 onwards. This is why the output differs between s10u6 and earlier versions. S10U1 through U5 UFS root: # dd if=/dev/rdsk/c0t0d0s0 bs=1b count=1 iseek=1 | od … [Read more...] about Howto Verify If a Bootblk is Installed on the Boot Disk (SPARC)
How To Change Timezone for Oracle Grid Infrastructure
This post illustrates how to change timezone setting for Grid Infrastructure after installation. Note: To check the current time zone on Linux, use the command: "timedatectl | grep 'Time zone'" To check the current time zone on Windows, use the command: "systeminfo | findstr /C:"Time Zone"" Grid Time Zone Setting Once OS default timezone is changed, make sure: For 11.2.0.1, shell environment variable TZ is set correctly for grid user and root. For 11.2.0.2 and above, TZ entry in … [Read more...] about How To Change Timezone for Oracle Grid Infrastructure
How to Set the TimeZone in Solaris 10,11
The Ask In Solaris Operating System (OS), where is the default timezone set, and how can it be changed? Solaris 11 OS and above 1. The default timezone is defined as a property of the "svc:/system/timezone:default" SMF service: # svcs timezone STATE STIME FMRI online Aug_22 svc:/system/timezone:default # svcprop timezone:default |grep localtime timezone/localtime astring US/Eastern 2. To change the default timezone, use the svccfg and then refresh the service … [Read more...] about How to Set the TimeZone in Solaris 10,11