https://www.bencode.io/tags/rhel/ Recent content in Rhel on Benny Simmonds Hugo -- 0.149.1 en-us Fri, 29 Oct 2021 16:20:09 +0000 https://www.bencode.io/posts/rhcsa/ Wed, 03 May 2017 20:51:43 +0000 https://www.bencode.io/posts/rhcsa/ <p>I&rsquo;m a software engineer not a sysadmin. In fact I know I&rsquo;m a bad one. The RHCSA is a rote, mechanical process. It did force me to discover discover several gaps in my GNU/Linux knowledge so overall happy about that.</p> <p><img alt="RHCSA badge" loading="lazy" src="https://www.bencode.io/images/4UNONHPY4EHDU5PWQH6LGPCESQAEQU3CUPSQX2KSDXT6RW46LQ3T7ULZ55KZZ56SKO7EQ3ETTLYZQ4U5NQYTCNA62RUWOCM34WWBUYQ=.png"></p> <ul> <li><a href="#essential-tools">Essential Tools</a> <ul> <li><a href="#documentation">Documentation</a> <ul> <li><a href="#man">man</a></li> <li><a href="#usrsharedoc">/usr/share/doc</a></li> <li><a href="#rpm-bundled-documentation">RPM bundled documentation</a></li> <li><a href="#general-searching-techniques">General Searching Techniques</a></li> </ul> </li> <li><a href="#shell-history">Shell history</a></li> <li><a href="#globbing">Globbing</a></li> <li><a href="#io-redirection-and-pipes">I/O Redirection and Pipes</a></li> </ul> </li> <li><a href="#essential-file-management">Essential File Management</a> <ul> <li><a href="#linux-file-system-layout">Linux file system layout</a></li> <li><a href="#finding-files">Finding Files</a> <ul> <li><a href="#locate">locate</a></li> <li><a href="#find">find</a></li> </ul> </li> <li><a href="#archiving-and-compression-with-tar">Archiving and compression with tar</a></li> <li><a href="#hard-and-soft-links">Hard and Soft Links</a></li> </ul> </li> <li><a href="#working-with-text">Working with text</a> <ul> <li><a href="#regular-expressions">Regular expressions</a></li> <li><a href="#grep">grep</a></li> <li><a href="#sed-and-awk">sed and awk</a></li> </ul> </li> <li><a href="#connecting-a-linux-host">Connecting a Linux host</a> <ul> <li><a href="#consoles-terminals-and-ttys">Consoles Terminals and TTYs</a></li> <li><a href="#switch-users-su">Switch Users (su)</a></li> <li><a href="#sudo">sudo</a></li> <li><a href="#ssh">SSH</a></li> </ul> </li> <li><a href="#managing-users-and-groups">Managing users and groups</a> <ul> <li><a href="#creating-users">Creating users</a></li> <li><a href="#user-properties">User properties</a></li> <li><a href="#user-configuration-files">User configuration files</a></li> <li><a href="#creating-and-managing-groups">Creating and managing groups</a></li> <li><a href="#managing-password-properties">Managing password properties</a></li> </ul> </li> <li><a href="#managing-permissions">Managing Permissions</a> <ul> <li><a href="#changing-file-ownership">Changing file ownership</a></li> <li><a href="#managing-basic-permissions">Managing basic permissions</a></li> <li><a href="#understanding-umask-user-mask">Understanding umask (user mask)</a></li> <li><a href="#special-permissions">Special permissions</a> <ul> <li><a href="#suid">suid</a></li> <li><a href="#sgid">sgid</a></li> <li><a href="#sticky-bit">Sticky bit</a></li> </ul> </li> <li><a href="#understanding-acls">Understanding ACLs</a></li> </ul> </li> <li><a href="#configuring-networking">Configuring Networking</a> <ul> <li><a href="#network-device-naming">Network device naming</a></li> <li><a href="#managing-runtime-network-configuration-with-ip">Managing runtime network configuration with ip</a></li> <li><a href="#storing-network-configuration-persistently">Storing network configuration persistently</a> <ul> <li><a href="#nmcli">nmcli</a></li> </ul> </li> <li><a href="#routing-and-dns">Routing and DNS</a></li> </ul> </li> <li><a href="#managing-processes">Managing Processes</a> <ul> <li><a href="#shell-jobs">Shell jobs</a></li> <li><a href="#ps">ps</a></li> <li><a href="#memory-usage">Memory usage</a></li> <li><a href="#cpu-load">CPU load</a></li> <li><a href="#system-activity-with-top">System activity with top</a></li> <li><a href="#sending-signals-to-processes">Sending signals to processes</a></li> <li><a href="#priority-and-niceness">Priority and niceness</a></li> <li><a href="#tuned-profiles">tuned profiles</a></li> </ul> </li> <li><a href="#managing-software">Managing Software</a> <ul> <li><a href="#rpm-and-yum">RPM and yum</a> <ul> <li><a href="#rpm-queries">rpm queries</a></li> <li><a href="#yum-groups">yum Groups</a></li> </ul> </li> <li><a href="#repositories">Repositories</a></li> <li><a href="#modules-and-application-streams">Modules and Application Streams</a></li> <li><a href="#red-hat-subscription-manager">Red Hat Subscription Manager</a></li> </ul> </li> <li><a href="#systemd">Systemd</a></li> <li><a href="#scheduling-tasks">Scheduling Tasks</a> <ul> <li><a href="#cron">cron</a></li> <li><a href="#at">at</a></li> <li><a href="#systemd-timers">systemd Timers</a></li> <li><a href="#tmpfilesd">tmpfiles.d</a></li> </ul> </li> <li><a href="#logging">Logging</a> <ul> <li><a href="#rsyslog">Rsyslog</a></li> <li><a href="#systemd-journal">Systemd Journal</a></li> <li><a href="#logrotate">Logrotate</a></li> </ul> </li> <li><a href="#managing-storage">Managing Storage</a> <ul> <li><a href="#disk-layout">Disk layout</a></li> <li><a href="#creating-partitions">Creating partitions</a> <ul> <li><a href="#gpt-partitions-with-parted">GPT partitions with parted</a></li> <li><a href="#mbr-partitions-with-fdisk">MBR partitions with fdisk</a></li> </ul> </li> <li><a href="#file-system-choices">File System Choices</a> <ul> <li><a href="#xfs">XFS</a></li> <li><a href="#ext4">Ext4</a></li> </ul> </li> <li><a href="#mounting">Mounting</a> <ul> <li><a href="#persistent-block-device-naming">Persistent block device naming</a></li> <li><a href="#systemd-mounts">systemd mounts</a></li> </ul> </li> <li><a href="#swap">Swap</a></li> </ul> </li> <li><a href="#advanced-storage">Advanced Storage</a> <ul> <li><a href="#lvm">LVM</a></li> <li><a href="#stratis">Stratis</a></li> <li><a href="#vdo">VDO</a></li> <li><a href="#luks">LUKS</a></li> </ul> </li> <li><a href="#advanced-tasks">Advanced tasks</a> <ul> <li><a href="#kernel-management">Kernel management</a></li> <li><a href="#boot-procedure">Boot procedure</a> <ul> <li><a href="#grub">GRUB</a></li> <li><a href="#systemd-targets">Systemd targets</a></li> </ul> </li> <li><a href="#essential-troubleshooting">Essential troubleshooting</a> <ul> <li><a href="#changing-root-password">Changing root password</a></li> </ul> </li> </ul> </li> <li><a href="#managing-network-services">Managing network services</a> <ul> <li><a href="#ssh-1">SSH</a></li> <li><a href="#httpd-apache">httpd (apache)</a></li> <li><a href="#selinux">SELinux</a> <ul> <li><a href="#context-labels">Context Labels</a></li> <li><a href="#booleans">Booleans</a></li> <li><a href="#file-context-labels">File context labels</a></li> <li><a href="#selinux-logs">SELinux logs</a></li> <li><a href="#selinux-troubleshooting">SELinux troubleshooting</a></li> </ul> </li> <li><a href="#firewalling-with-firewalld">Firewalling with firewalld</a></li> <li><a href="#automating-installs">Automating installs</a></li> <li><a href="#time-services">Time services</a></li> <li><a href="#remote-file-systems">Remote file systems</a> <ul> <li><a href="#nfs">NFS</a></li> <li><a href="#cifs-with-samba">CIFS with Samba</a></li> </ul> </li> <li><a href="#automount">Automount</a></li> <li><a href="#containers">Containers</a> <ul> <li><a href="#autostarting-non-root-containers-with-systemd-user-units">Autostarting non-root containers with systemd user units</a></li> </ul> </li> </ul> </li> <li><a href="#dont-forget-list">Dont forget list</a></li> <li><a href="#exam-shakedown">Exam shakedown</a></li> <li><a href="#linux-gems">Linux Gems</a></li> </ul> <h1 id="essential-tools">Essential Tools</h1> <h2 id="documentation">Documentation</h2> <p>The ability to understand a program using local documentation resources; man, info, /usr/share/doc, within the RPM package.</p>