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tech:linux:centos:start
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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tech:linux:centos:start [2020/02/14 17:54] rk4n3 |
tech:linux:centos:start [2022/01/31 17:14] (current) rk4n3 |
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| Line 35: | Line 35: | ||
| * yum install gcc-c++ | * yum install gcc-c++ | ||
| * yum install mariadb-devel | * yum install mariadb-devel | ||
| + | * yum install centos-release-scl | ||
| ==== If VirtualBox VM Guest ==== | ==== If VirtualBox VM Guest ==== | ||
| Line 59: | Line 60: | ||
| ==== If using ZFS ==== | ==== If using ZFS ==== | ||
| See [[https://github.com/zfsonlinux/zfs/wiki/RHEL-and-CentOS|official documentation]] for further details | See [[https://github.com/zfsonlinux/zfs/wiki/RHEL-and-CentOS|official documentation]] for further details | ||
| - | * ''yum install epel-release -y'' | + | * ''dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm'' |
| * ''yum install kernel-devel'' | * ''yum install kernel-devel'' | ||
| * ''yum install http://download.zfsonlinux.org/epel/zfs-release.el7_4.noarch.rpm'' | * ''yum install http://download.zfsonlinux.org/epel/zfs-release.el7_4.noarch.rpm'' | ||
| Line 92: | Line 93: | ||
| * java-1.8.0-openjdk-devel | * java-1.8.0-openjdk-devel | ||
| * gd-devel | * gd-devel | ||
| + | |||
| + | |||
| + | ==== Update a specific repository ==== | ||
| + | ''yum --disablerepo="*" --enablerepo="epel" update'' | ||
| + | |||
| ==== Enable TCP listen for X ==== | ==== Enable TCP listen for X ==== | ||
| // ... to be added ... // | // ... to be added ... // | ||
| + | |||
| ==== Add firewall rule for HTTP ==== | ==== Add firewall rule for HTTP ==== | ||
| Line 107: | Line 114: | ||
| hostnamectl set-hostname Your-New-Host-Name-Here --transient</code> | hostnamectl set-hostname Your-New-Host-Name-Here --transient</code> | ||
| - | ==== ulimits ==== | + | ==== ulimit ==== |
| In ''/etc/security/limits.conf'', create a file like ''20-nofile.conf'': | In ''/etc/security/limits.conf'', create a file like ''20-nofile.conf'': | ||
| <code> | <code> | ||
| - | * soft nofile 8192 | + | * hard nofile 4096 |
| - | * hard nofile 8192 | + | * soft nofile 1024 |
| + | @users soft nofile 2048 | ||
| + | rk4n3 hard nofile 81920 | ||
| + | rk4n3 soft nofile 8192 | ||
| </code> | </code> | ||
| ------ | ------ | ||
| ===== Some Application Trivia ===== | ===== Some Application Trivia ===== | ||
| + | |||
| + | ==== Routine CLI ==== | ||
| + | * Duplicate SElinux attributes: ''chcon %%--%%reference=oldfileordir newfileordir'' | ||
| + | * Update from specific repo only: ''yum %%--%%disablerepo="*" %%--%%enablerepo="my-repo" update'' | ||
| + | |||
| ==== rsyslog & logrotate ==== | ==== rsyslog & logrotate ==== | ||
| * In ''/etc/rsyslog.d/yourapp.conf''<code> | * In ''/etc/rsyslog.d/yourapp.conf''<code> | ||
| Line 161: | Line 176: | ||
| ===== Some Issues -> Solutions ===== | ===== Some Issues -> Solutions ===== | ||
| + | |||
| + | ==== Raw network/socket access ==== | ||
| + | * Allow a program (i.e. ''/usr/bin/ping''): ''setcap cap_net_raw+p /path/to/command'' | ||
| + | |||
| + | ==== systemd journal ==== | ||
| + | * Clear out journal(s): ''journalctl -m --vacuum-time=1s'' | ||
| + | |||
| ==== Upgrading ==== | ==== Upgrading ==== | ||
| CentOS will typically require accepting license agreement (again) after a significant upgrade. \\ | CentOS will typically require accepting license agreement (again) after a significant upgrade. \\ | ||
tech/linux/centos/start.1581724484.txt.gz · Last modified: 2020/02/14 17:54 by rk4n3
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