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Community ENTerprise Operating System; a Linux distribution based on Red Hat Enterprise Linux widely used on web servers.

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3 answers

How many CPUS on my CentOS 7?

I have a Java program which runs quite fast on my local Mac and its info as below: Processor:2.4 GHz 8-Core Intel Core i9 Memory: 16 GB 2400 MHz DDR4 When I run the same program on a CentOs 7, it seems …
  • 135
0 votes
1 answer

Why doesn't my ssh ask for password?

I created a user 'bbword' on my remote CentoOs a while ago and it belongs to the group 'wheel'. I just changed its password. I have two questions: 1) On my current user, after I execute "su bbword" & …
  • 135
0 votes
1 answer

Why does my program slows down a lot on server?

The CentOs cpus is below: # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 85 model name : Intel(R) Xeon(R) Silver 4114 CPU @ 2.20GHz stepping : 4 microcode … Does it make sense that the CentOs takes almost double time to complete the same task? …
  • 135
1 vote
1 answer

How to properly upgrade gcc on Centos 7?

I did this to upgrade gcc from 4.8.5 to gcc 7: sudo yum install centos-release-scl sudo yum install devtoolset-7-gcc* source /opt/rh/devtoolset-7/enable This does give me the gcc 7 in the current bash … Is there a way to make the gcc 7 default in the whole centos system? And this might solve the problem of 1). …
  • 135