Linux Redhat 0 Comments

Performance tunning is one of the most exciting and complicated subject at the same time, it’s complicated because if you change one setting it might affect the others so you must have a deep understanding of the what, how, why and the why not of other aspect of the operating system that you would like

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Let’s take the linux shadow file as an example. Using sed you can replace the root user password with an empty character. Suppose your /etc/shadow file look like this: [root@localhost ~]# cat /etc/shadow root:$6$GE3JYGgDvt5jloXN$l0cNhqsh8564GHsdSgUGz79Cqm2ml.Q0xmtgSDyUVdJRHrgFIWPd0QKB02RedspqunU4yYS0/xDI0fcZgEGt.::0:99999:7::: You can use the following sed command to replace the root password string between the two semicolon with an empty string.

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