the OS provides simple tools, while shell scripting and command language combine to perform complex workflows. Linux supports a number of languages, including PHP, Perl, Ruby, Python and others. This diversity
To "grep" the phone numbers, I am going to write my regex using meta-characters to isolate the relevant data and ignore what I don't need. The complete command is going to look like this: christopher@linux-handbook:~$ grep '\(([0-9]\{3\})\|[0-9]\{3\}\)[ -]\?[0-9]\{...
Short for “disk free”, df is a command used to display the free disk space in Linux and other similar operating systems. It is also used to understand and ascertain the file systems that are mounted. Now, you may have noticed that I mentioned that this command can be used to define ...
The.bashrcfile is a script file that’s executed when a user logs in. The file itself contains a series of configurations for the terminal session. This includes setting up or enabling: coloring, completion, shell history, command aliases, and more. It is ahidden fileand simplels commandwon...
How to check inode in Linux? You can easily list the inodes number with the following command: ls -i The following pictures show my root directory with corresponding inode numbers. The amount of inodes each file system has is decided when you create the filesystem. For most users, the defa...
wakes up (executes) to handle periodic service requests when required. The daemon runs when the system boots from /etc/init.d or /etc/rc.d/init.d scripts. Thus, it can be started or stopped -- or restarted -- using theinitscript or with a command service crond start in Linux systems...
In addition to the API, the LXD platform includes a command-line interface (CLI) for controlling the LXD environment. The two most important commands available to the CLI are the following: lxd.Thelxdcommand controls the LXD daemon. Administrators do not need to use this command often because...
st, “steal time”, is only relevant in virtualized environments. It represents a time when the real CPU was not available to the current virtual machine — it was “stolen” from that VM by the hypervisor (either to run another VM or for its own needs). ...
What is its importance? Can it be enabled or disabled on the host? Environment Red Hat Enterprise Linux ethtool NICs hardware features Subscriber exclusive content A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. ...
Thesos reportcommand is a tool that collects configuration details, system information and diagnostic information from a Red Hat Enterprise Linux system. For instance: the running kernel version, loaded modules, and system and service configuration files. The command also runs external programs to coll...