Unix & Linux

Linux raid disappears after reboot

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My troubleshooting ability in Linux is not impressive, just so you know. I can follow instructions very well on the other hand. I have a Linux server with Linux raid. It was working well with no problems for about half a year but then I had a power failure and have been getting the same problem ever since. After rebuilding the raid all my files are still there, so that’s a good thing. When I reboot the server the raid device md0 is gone.

user ID less than 1000 on CentOS 7

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I am now installing a new Linux server with CentOS-7. Before, I used CentOS-6 on all machines and used uid = 555 for my account. However, on CentOS-7, it seems that uid <= 999 are reserved for system (accoding to some articles on the net). For testing purpose, I have tried to make an account with uid = 555, such that

logrotate not working

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I want to set up daily logrotate for my Tomcat server’ catalina.out log file but it’s not working – I haven’t seen the rotated log files created.
To troubleshoot, I ran logrotate -d /etc/logrotate.conf and got the following:

Can I connect to or view abandoned ssh sessions?

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I have a virtual instance of redhat running that I can ssh to from any host on the corporate network. My ssh session was dropped while running some scripts that may or not have caused me to disconnect. The who command locally still lists the dropped connection. Reconnecting with ssh starts a whole new session. Is there a way to connect to the original session? If not can I kill it? I have root and physical access. I was not using screen in the original session.