resource limits and mysql
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bash.md
30
bash.md
@ -35,4 +35,32 @@ wc - print line counts
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free - memory usage
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du - disk space by file
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du - disk space by file
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Resource Limit
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--------------------------------------------------------------------------------------------------------------
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`ulimit -a` to see all limits
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file at /etc/security/limits.conf to configure defaults
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MySQL
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---------------------------------------------------------------------------------------------------------------
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connection like `mysql -u root -p`
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`show databases;`
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user is in the format root@127.0.0.1
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`grant all prviileges on *.* to 'root'@'127.0.0.1'`
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data is stored in /var/lib/mysql
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failure to drop a db can be due to presence of unknown file in the database directory
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SSH
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----------------------------------------------------------------------------------------------------------------
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add client
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* client uses ssh-keygen to create a key in `/home/un/.ssh/` under files `id_rsa` and `id_rsa.pub`
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* host setup //etc/ssh/sshd_config to allow passwords and restart
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* client uses `ssh-copy-id host_address -p port_num` to move the key to the host
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* client uses `ssh` to login
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