convert a PFX to a seperate .key/.crt file

So after you installed OpenSSL you can start it from it’s Bin folder. I’d like to put OpenSSL\Bin in my path so I can start it from any folder. Fire up a command prompt and cd to the folder that contains your .pfx file. First type the first command to extract the private key: openssl […]

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OpenSSL command reference

OpenSSL command reference General OpenSSL commands commands to generate CSRs, Certificates, Private Keys and other tasks. Generate a new private key and matching certificate signing request (Unix) openssl req -out CSR.csr -pubkey -new -keyout privateKey.key Generate a new private key and matching certificate signing request (Windows) openssl req -out CSR.csr -pubkey -new -keyout privateKey.key -config […]

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Configuring automatic startup of Oracle Database under systemd on RHEL 7/OEL 7/CentOS 7

Configuring automatic startup of Oracle Database under systemd on RHEL 7/OEL 7/CentOS 7 There are several methods how to start Oracle Database automatically during/after OS boot. You can use Oracle CRS, other clusterware or init implemented in Linux. Starting RHEL 7 SysV init has been replaced by systemd or simply said systemd is the new […]

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IPMI

IPMI ( Intelligent Platform Management Interface ) : It is a remote hardware health monitoring and management system that defines interfaces for use in monitoring the physical health of servers. IPMI provides a way to monitor & manage a server system that may be powered off or unresponsive by using a network connection to the […]

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dynamic date value in shell scripts

dynamic date value in shell scripts using a variable – easier to read in scripts: NOW=$(date +”%Y%m%d%H%M%S”) echo “bar” > “$NOW”foobar.txt one-line, equivalent to above: echo “bar” > $(date +”%Y%m%d%H%M%S”)foobar.txt alternate single-line format: echo “bar” >> $(date “+myfile%Y%m%d.txt”) man strftime to see formatting values

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Fix stale NFS mounts on linux without rebooting

Fix stale NFS mounts on linux without rebooting I have often noticed that some folks reboot systems to fix stale NFS mount problems which can be disruptive. Fortunately, that often isn’t necessary. All you have to do is restart nfs and autofs services. However that sometimes fails because user processes have files open on the […]

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KernelCare is now available for CentOS & RHEL 7 kernels

KernelCare for CentOS & RHEL 7 KernelCare is now available for CentOS & RHEL 7 kernels. Latest CentOS / RHEL kernels can be patched against privilege escalation vulnerability CVE-2014-4943. Other supported kernels were patched against it last week CVEs: CVE-2014-4943 Systems with AUTO_UPDATE=True (DEFAULT) in /etc/sysconfig/kcare/kcare.conf will automatically update, and no action is needed for […]

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List/Change kernel in centos 7

List/Change kernel in centos 7 Following command can be used to list the kernels in centos 7 ============================ # egrep ^menuentry /etc/grub2.cfg | cut -f 2 -d \’ Linux Server, with Linux 3.10.0-123.el7.x86_64 Linux Server, with Linux 3.10.0-123.4.4.el7.x86_64 Linux Server, with Unbreakable Enterprise Kernel 3.8.13-35.3.2.el7uek.x86_64 Linux Server, with Unbreakable Enterprise Kernel 3.8.13-35.3.1.el7uek.x86_64 Linux Server, with […]

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