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service command

I'm getting the following error when I run mysql -u root -p

Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

How do I solve this problem under CentOS / RHEL / Red Hat Enterprise Linux server 5.x or 6.x?
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RHEL / Centos Linux Disable Firewall

How do I disable firewall on CentOS or Red Hat Enterprise Linux server version 5.x/6.x running on my HP micro server?
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We are using NFS v4 server under RHEL 6.x+. How do I configure CacheFS for NFS under Red Hat Enterprise Linux or CentOS to speed up file access and reduce load on our NFS server?
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Linux: Start / Stop / Restart BIND DNS Server

How do I start / stop / restart the Berkeley Internet Name Daemon (BIND) dns server under Linux operating systems?
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Debian Linux Install OpenSSH SSHD Server

How do I install OpenSSH sshd server under Debian GNU/Linux operating systems?
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Can you tell me differences between the following sysvinit /sbin/service command:

service httpd restart

service httpd condrestart

service httpd reload

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Linux Deleting Firewall Rules

I would like to to delete my iptables based firewall rules under Linux. How do I delete rules individually or all at once under CentOS or Fedora Linux or RHEL based servers?
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