Solution to the image with error is to add before the wget CMD RUN yum -y install wget If you write it like this, it is the same result, just different execution: RUN wget http://www.us.apache.org/dist/tomcat/tomcat-6/v6.0.44/bin/apache-tomcat-6.0.44.tar.gz Don’t use the quotes and comma in RUN command.
Search for the package in yum , use the following command: yum search python3 | grep devel It will list all the available devel packages. The result will be somewhat like this python3-cairo-devel.x86_64 : Libraries and headers for python3-cairo python3-devel.x86_64 : Libraries and header files needed for Python 3 : development python34-devel.x86_64 : Libraries and … Read more
The version of firewalld in RHEL 7.0 has no “save” script and no way to copy the running firewall configuration to the permanent configuration. You save a firewall change with firewalld by adding –permanent to the command line making the change. Without it, any change you make is temporary and will be lost when the … Read more
You should install iptables-services package. Then service iptables save will work. Also these commands will work too: # iptables-save > /etc/sysconfig/iptables # ip6tables-save > /etc/sysconfig/ip6tables AFAIK, systemctl doesn’t have any option to save iptables-services’ configuration. Note: systemctl syntax is as follow : systemctl <operation> <unit>
Bash allows you to connect to TCP and/or UDP ports by redirecting to special files: /dev/tcp/host/port If host is a valid hostname or Internet address, and port is an integer port number or service name, Bash attempts to open the corresponding TCP socket. /dev/udp/host/port If host is a valid hostname or Internet address, and port … Read more
I think there’s a more elegant way to solve the problem: send the stdout/stderr to syslog with an identifier and instruct your syslog manager to split its output by program name. Use the following properties in your systemd service unit file: StandardOutput=syslog StandardError=syslog SyslogIdentifier=<your program identifier> # without any quote Then, assuming your distribution is … Read more
Make sure you have the iptables-services package installed. This legacy package provides the systemd scripts for the previous iptables invocation. This package is not always installed, depending on your installation choices when you installed (or upgraded). yum install iptables-services And of course, if possible, you should use the new firewalld system. It should only be … Read more
As noted in https://access.redhat.com/articles/3311301 CVE-2017-5715 (variant #2/Spectre) is an indirect branching poisoning attack that can lead to data leakage. This attack allows for a virtualized guest to read memory from the host system. This issue is corrected with microcode, along with kernel and virtualization updates to both guest and host virtualization software. This vulnerability requires … Read more