Lazy detect Linux distro 
This script detects the Linux distro. You need to execute it in a Linux shell.
Tested on Ubuntu, Red Hat and SUSE.
Github link
#!/bin/bash
#Updated: Malware 2015
declare os_VENDOR os_RELEASE os_UPDATE os_PACKAGE os_CODENAME
########################################################################
# Determine what OS is running
########################################################################
# GetOSVersion
function GetOSVersion {
# Figure out which vendor we are
if [[ -x "`which sw_vers 2>/dev/null`" ]]; then
# OS/X
os_VENDOR=`sw_vers -productName`
os_RELEASE=`sw_vers -productVersion`
os_UPDATE=${os_RELEASE##*.}
os_RELEASE=${os_RELEASE%.*}
os_PACKAGE=""
if [[ "$os_RELEASE" =~ "10.7" ]]; then
os_CODENAME="lion"
elif [[ "$os_RELEASE" =~ "10.6" ]]; then
os_CODENAME="snow leopard"
elif [[ "$os_RELEASE" =~ "10.5" ]]; then
os_CODENAME="leopard"
elif [[ "$os_RELEASE" =~ "10.4" ]]; then
os_CODENAME="tiger"
elif [[ "$os_RELEASE" =~ "10.3" ]]; then
os_CODENAME="panther"
else
os_CODENAME=""
fi
elif [[ -x $(which lsb_release 2>/dev/null) ]]; then
os_VENDOR=$(lsb_release -i -s)
os_RELEASE=$(lsb_release -r -s)
os_UPDATE=""
os_PACKAGE="rpm"
if [[ "Debian,Ubuntu,LinuxMint" =~ $os_VENDOR ]]; then
os_PACKAGE="deb"
elif [[ "SUSE LINUX" =~ $os_VENDOR ]]; then
lsb_release -d -s | grep -q openSUSE
if [[ $? -eq 0 ]]; then
os_VENDOR="openSUSE"
fi
elif [[ $os_VENDOR == "openSUSE project" ]]; then
os_VENDOR="openSUSE"
elif [[ $os_VENDOR =~ Red.*Hat ]]; then
os_VENDOR="Red Hat"
fi
os_CODENAME=$(lsb_release -c -s)
elif [[ -r /etc/redhat-release ]]; then
# Red Hat Enterprise Linux Server release 5.5 (Tikanga)
# Red Hat Enterprise Linux Server release 7.0 Beta (Maipo)
# CentOS release 5.5 (Final)
# CentOS Linux release 6.0 (Final)
# Fedora release 16 (Verne)
# XenServer release 6.2.0-70446c (xenenterprise)
os_CODENAME=""
for r in "Red Hat" CentOS Fedora XenServer; do
os_VENDOR=$r
if [[ -n "`grep \"$r\" /etc/redhat-release`" ]]; then
ver=`sed -e 's/^.* \([0-9].*\) (\(.*\)).*$/\1\|\2/' /etc/redhat-release`
os_CODENAME=${ver#*|}
os_RELEASE=${ver%|*}
os_UPDATE=${os_RELEASE##*.}
os_RELEASE=${os_RELEASE%.*}
break
fi
os_VENDOR=""
done
os_PACKAGE="rpm"
elif [[ -r /etc/SuSE-release ]]; then
for r in openSUSE "SUSE Linux"; do
if [[ "$r" = "SUSE Linux" ]]; then
os_VENDOR="SUSE LINUX"
else
os_VENDOR=$r
fi
if [[ -n "`grep \"$r\" /etc/SuSE-release`" ]]; then
os_CODENAME=`grep "CODENAME = " /etc/SuSE-release | sed 's:.* = ::g'`
os_RELEASE=`grep "VERSION = " /etc/SuSE-release | sed 's:.* = ::g'`
os_UPDATE=`grep "PATCHLEVEL = " /etc/SuSE-release | sed 's:.* = ::g'`
break
fi
os_VENDOR=""
done
os_PACKAGE="rpm"
# If lsb_release is not installed, we should be able to detect Debian OS
elif [[ -f /etc/debian_version ]] && [[ $(cat /proc/version) =~ "Debian" ]]; then
os_VENDOR="Debian"
os_PACKAGE="deb"
os_CODENAME=$(awk '/VERSION=/' /etc/os-release | sed 's/VERSION=//' | sed -r 's/\"|\(|\)//g' | awk '{print $2}')
os_RELEASE=$(awk '/VERSION_ID=/' /etc/os-release | sed 's/VERSION_ID=//' | sed 's/\"//g')
fi
export os_VENDOR os_RELEASE os_UPDATE os_PACKAGE os_CODENAME
}
########################################################################
# Determine if current distribution is a Fedora-based distribution
########################################################################
function is_fedora {
if [[ -z "$os_VENDOR" ]]; then
GetOSVersion
fi
[ "$os_VENDOR" = "Fedora" ] || [ "$os_VENDOR" = "Red Hat" ] || \
[ "$os_VENDOR" = "CentOS" ] || [ "$os_VENDOR" = "OracleServer" ]
}
########################################################################
# Determine if current distribution is a SUSE-based distribution
########################################################################
function is_suse {
if [[ -z "$os_VENDOR" ]]; then
GetOSVersion
fi
[ "$os_VENDOR" = "openSUSE" ] || [ "$os_VENDOR" = "SUSE LINUX" ]
}
########################################################################
# Determine if current distribution is an Ubuntu-based distribution
########################################################################
function is_ubuntu {
if [[ -z "$os_PACKAGE" ]]; then
GetOSVersion
fi
[ "$os_PACKAGE" = "deb" ]
}
if is_fedora ; then
#Install stuff on FEDORA
echo "I'm FEDORA."
elif is_ubuntu ; then
# Install stuff on UBUNTU
echo "I'm UBUNTU."
elif is_suse ; then
#Install stuff on SUSE
echo "I'm SUSE."
fi
That's all, folks!
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