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wp cli – Manage WordPress through the command-line.
(for environment without web browser)
Install the tool:
curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
chmod +x wp-cli.phar; mv wp-cli.phar /usr/local/bin/wp
wp –info
wp plugins list (cmd to list all wordpress plugins installed)
wp plugin desactive easy-pricing-tables (cmd to desactive plugin)
Tool update
wp cli update
expected results:
Success: Updated WP-CLI to x.x.x
ou
WP-CLI is at the latest version.
requirement: wodim-1.1.11-25.el7.x86_64 : A command line CD/DVD recording program
yum install wodim (if necessary)
command to find your HW (DVD/Blue Ray/CD-ROM) devices
Some possible Result
Command to record to DVD
Log of execution
Finish up and the DVD is ejected!
Official Process of Migration from RHEL 7 to 8
Requirements:
Intel 64 Arch
Installation of Tool Leapp using Red Hat Subscription Manager)
wget https://access.redhat.com/sites/default/files/attachments/leapp-data3.tar.gzAt least 100MB of free space available on the boot partition
RHEL 7.6
Some important limitations
No rollback guarantied
Packages that are not a part of the Minimal (@minimal) or Base (@base) package groups might cause the upgrade process to fail.
No file system encryption supported on a system targeted.
No supported for Network Storage Mount (e.g. iSCSI, FCoE, or NFS)
Firewall will be disabled during the upgrade
The whole system must be mounted under the root file system, with the exception of /home and /boot.
- Ex: /var, /opt, or /usr, etc… cannot be mounted on a separate partition
UEFI is currently unsupported.
Snapshot of all commands during the upgrade:
subscription-manager list --installedsubscription-manager repos --disable rhel-7-server-rpms --enable rhel-7-server-eus-rpmssubscription-manager repos --disable rhel-7-server-optional-rpms --enable rhel-7-server-eus-optional-rpmsyum versionlock clearsubscription-manager release --set 7.6yum update; reboot; subscription-manager repos --enable rhel-7-server-extras-rpmsyum install leapp(begin the upgrade) leapp preupgrade (optional)leapp upgrade cat /var/log/leapp/leapp-report.txt (end of upgrade) reboot(After the upgrade): setenvforce 1; systemctl enable firewalld.service; systemctl start firewalld.service; cat /etc/redhat-release
Command leapp Tips:
use the extra parameters LEAPP_OVL_SIZE=2048MB for XFS system
where is the log of migration:
/var/log/leapp/leapp-report.txt
The Go programming language is an open source project to make programmers more productive.
Go compiles quickly to machine code yet has the convenience of garbage collection and the power of run-time reflection
Multicore and Networked machines
Support target: windows 32/64bits, linux 32/64bits, MacOS
IDE Integration with vim, visual studio code, goland plugin (intellij) and atom
Go Code example: (for diagnostic)
diagnostic.go
package main
import (
“log”
“net/http”
“net/http/pprof”
)func main() {
mux := http.NewServeMux()
mux.HandleFunc(“/custom_debug_path/profile”, pprof.Profile)
log.Fatal(http.ListenAndServe(“:5555”, mux))
}
Multi-GPU setups are not supported under Wayland.
The NVIDIA binary driver does not work under Wayland.
The xrandr utility does not work under Wayland
No clipboard manager is available
Use the X11 session for virtual environments. (Wayland inside guest virtual machines)
workaround:
Set WaylandEnable=false to the file /etc/gdm/custom.conf
Special Warning for CentOS/VirtualBox users
If you are planning to install CentOS-8 in a VirtualBox guest, you should not select “Server with a GUI” (default) during the installation
Installing the VirtualBox Addons will produce an error if your version is 6.0.12/5.2.32 or lower. This is fixed with versions 6.0.14 and 5.2.34
PackageKit is unable to resolve local DNF/YUM variables
CentOS 8 in VirtualBox 5.2.32 (graphical install screen problem):
using the vbox Host key + 2 to switch to VT 2 and then vbox Host key + 6 to switch back to the graphical install screen.