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Sunday, December 3, 2017

Linux server manual patching by using yum step by step

Linux server manual patching by using yum  step by step

Follow the below steps to complete the manual patching of Linux server.

$ yum -y update yum >/dev/null 2>&1
$ yum -y update libstdc++ >/dev/null 2>&1
$ yum -y update kernel glibc >/dev/null 2>&1
$ yum -y update >/dev/null 2>&1

>       - redirect
/dev/null -  black hole where any data sent, will be discarded
2    - file descriptor for Standard Error
>    - redirect
&    - symbol for file descriptor (without it, the following 1 would be considered a filename)
1    - file descriptor for Standard Out

So  >/dev/null 2>&1 is redirect the output of your program to /dev/null. Include both the Standard Error and Standard Out. For more info refer Linux I/O redirection.

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