As System Administrator , we install and manage Linux and Solaris servers, manage and design backups through ad hoc self made policy.
We restore data from backups after a disaster or if only one or more files are needed.
We set firewall rules and control intrusions and analyze network traffic to identify problems.
We check the file system for data integrity verification and for backdoor or rootkit presence.
We manage and configure disk raids and configure logical volumes for backups ( LVM ), we manipulate and modify the partitions. We replace broken or corrupted disks in case of need.
We install and configure major software such as Apache, php, mod_perl, cms, postfix or sendmail, bind, ssh, MySQL or PostgreSQL.