I don't know if there's a fool proof way to find out which Linux distro you are running on, but here are some ways you can try: cat /proc/version cat /etc/issue cat /etc/*release lsb_release -a Results on Ubuntu 11.10 oneiric: $ cat /proc/version Linux version 3.0.0-13-gene... Results on Red Hat Enterprise Server: $ cat /proc/version Linux version 2.6.18-128.1....

The command " ifconfig -a " does not list the DNS servers. Use " cat /etc/resolv.conf " to look at the DNS server configuration. It works for DHCP configured network interfaces also. $ cat /etc/resolv.conf # Generated by NetworkMa... If no DNS server is configured: $ cat /etc/resolv.conf # Generated by NetworkMa...

Three ways to find the Ubuntu version: $ cat /etc/issue Ubuntu 11.04 \n \l $ lsb_release -a No LSB modules are available. ... $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DIS...

Email attachment blocking is a safety measure that can be a real pain in the *&^ when you have a legitimate need to send some file types that are considered "dangerous". Fortunately, as developers we have more than one weapon in our arsenal to defeat that feature. Here are some options I tried. Put the offending file in a zip - doesn't work for some services, Gmail is an example. Change file extension, e.g., from .exe to .ex_ or .doc. But this does not work if you are sending a WAR (Wab Application Archive) that contains hundreds of .js files. Base64 encode the zip, then gzip it. To restore: cat received.gz | gzip -d - | base64 -d - >origina... This may still fail for...

The -d switch for cURL sends HTTP POST with data from the command line. To verify the data being posted, this is a CGI script that echos the data back: #!C:/perl/bin/perl.exe ## ## echo -- echos ... Examples: POST data from command line: C:\>curl -d input1=value1^&input1=value2 http://lo... POST data from stdin (with @ before the - symbol): C:\>curl -d @- http://localhost/cgi-bin/echo.pl ... POST data from a file (with @ before the - symbol and input redirect): C:\tmp>cat data.txt abcd 1234 xyz ... For some reason, @ with file name didn't work as expected: C:\tmp>curl -d @data.txt http://localhost/cgi-bin/... One thing to notice is that cURL removes the new line characters when posting (thus the echo back is only one line instead of three). This can...

Use the uname command to display the SunOS version: $ uname -a SunOS STAWOW1 5.10 Generic_142900-01... I can't find a command to display Solaris version. But the /etc/release file gives version information: $ cat /etc/release Solar... This is a mapping of SunOS versions to Solaris versions: SunOS Version Solaris Version SunOS 5.4 Solaris 2.4 SunOS 5.5 Solaris 2.5 SunOS 5.5.1 Solaris 2.5.1 SunOS 5.6 Solaris 2.6 SunOS 5.7 Solaris 7 SunOS 5.8 Solaris 8 SunOS 5.9 Solaris 9 SunOS 5.10 Solaris 10 Reference: SUN Solaris Unix Commands and Scripts

A runlevel is used to group the daemons (services) to start. For the Fedora/Redhat based Linux systems, the primary runlevels are: runlevel 1: Single-User Mode runlevel 2: Multi-User Mode runlevel 3: Multi-User Mode with Networking runlevel 5: X11 (runlevel 3 + X Window System) The typical workstation runs in runlevel 5. Servers without X-server runs in runlevel 3. To determine what runlevel you are using: # /sbin/runlevel To determine what runlevel your system will boot with: # cat /etc/inittab | grep :initdefault: id:5:in... To switch runlevels (replace RUNLEVEL with appropriate number): # /sbin/init RUNLEVEL When you switch runlevel, be sure that you are at a text console so that you don't accidentally kill your session when X-server is killed.