Check Kernel and Package information in Linux
check Linux distribution and version
====================================================
#1
[root@localhost ~]# cat /etc/os-release
NAME="Oracle Linux Server"
VERSION="7.8"
ID="ol"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.8"
PRETTY_NAME="Oracle Linux Server 7.8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:oracle:linux:7:8:server"
HOME_URL="https://linux.oracle.com/"
BUG_REPORT_URL="https://bugzilla.oracle.com/"
ORACLE_BUGZILLA_PRODUCT="Oracle Linux 7"
ORACLE_BUGZILLA_PRODUCT_VERSION=7.8
ORACLE_SUPPORT_PRODUCT="Oracle Linux"
ORACLE_SUPPORT_PRODUCT_VERSION=7.8
[root@localhost ~]#
#2
[root@localhost ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.8 (Maipo)
[root@localhost ~]#
#3
[root@localhost ~]# cat /etc/oracle-release
Oracle Linux Server release 7.8
[root@localhost ~]#
check kernel version
============================
[root@localhost ~]# uname -r
4.14.35-1902.300.11.el7uek.x86_64
[root@localhost ~]#
To check Package is installed or not
=========================================
rpm -q package_name
rpm -qa --queryformat "%{NAME}-%{VERSION}-%{RELEASE} (%{ARCH})\n" | grep package_name
[root@localhost ~]#
[root@localhost ~]# rpm -qa --queryformat "%{NAME}-%{VERSION}-%{RELEASE} (%{ARCH})\n" | grep ssh
openssh-server-7.4p1-21.0.1.el7 (x86_64)
openssh-7.4p1-21.0.1.el7 (x86_64)
openssh-clients-7.4p1-21.0.1.el7 (x86_64)
libssh2-1.8.0-3.el7 (x86_64)
[root@localhost ~]#
check multiple packages, and review the output for the validations
====================================================================
rpm -q binutils compat-libstdc++ gcc glibc libaio libgcc libstdc++ \
make sysstat unixodbc
[root@localhost ~]# rpm -q binutils compat-libstdc++ gcc glibc libaio libgcc libstdc++ \
> make sysstat unixodbc
binutils-2.27-43.base.0.1.el7.x86_64
package compat-libstdc++ is not installed
gcc-4.8.5-39.0.3.el7.x86_64
glibc-2.17-307.0.1.el7.1.x86_64
libaio-0.3.109-13.el7.x86_64
libgcc-4.8.5-39.0.3.el7.x86_64
libstdc++-4.8.5-39.0.3.el7.x86_64
make-3.82-24.el7.x86_64
sysstat-10.1.5-19.el7.x86_64
package unixodbc is not installed
[root@localhost ~]#
