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man ssh_config: Three Test Host: ram5 ram6 ram7 /etc/ssh/sshd_config: GatewayPorts yes | no this will dertermin SSHD listen address Command Line: ssh 阅读全文
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env and printenv is not shell builtin, so they can only print environment variables. env: run a program in a modified environment --ignore-environment 阅读全文
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Causation: Your origin remote is set up to fetch only certain branches git remote set-branches --add origin bb git remote set-branches origin '*' It i 阅读全文
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display NUMA state journalctl --dmesg | grep -i NUMA dmesg --kernel --human | grep -i NUMA only have one node, so it doesn't matter. numastat # cat /s 阅读全文
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compgen is a shell builtin compgen -u : display users -a means Names of alias -b means Names of shell builtins -c means Names of all commands -d means 阅读全文
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Services Record (SRV) Defined in RFC 2782. The SRV RR identifies the host(s) that will support a particular service. The MX RR is a specialised exampl 阅读全文