Category Archives: System

System commands, mainly related to the system itself, such as: env, uname, etc.

How to modify the host name in Ubuntu

How to change the host name? The answer is to use Linux hostname command. About the hostname command.About the /etc/hostname file.About the /etc/hosts file. Continue reading

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echo command tutorial in linux/unix with examples and use cases

linux echo command – one of the most commonly used commands and is commonly used in scripting languages ​​to display a line of text/string on a standard output or file. Continue reading

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w command tutorial in linux/unix with examples and use cases

linux w command – Show who is logged on and what they are doing. w displays information about the users currently on the machine, and their processes. Continue reading

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passwd command tutorial in linux/unix with examples and use cases

linux passwd command – modify a user’s password.This post shares the syntax, options, related system files, return values, and common usage examples. Continue reading

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linux iostat syntax and iostat examples

linux iostat command is an abbreviation for I/O statistics (input/output statistics). Iostat is a computer system monitor tool used to collect and show operating system storage input and output statistics. Syntax interval: The interval parameter specifies the amount of time … Continue reading

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Open SSH service in Ubuntu

SSH is divided into client (openssh-client) and server (openssh-server). If you just want to log in to SSH of other machines, you only need to install openssh-client; Openssh-client is installed by default on Ubuntu system. If not, you can install … Continue reading

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curl vs wget difference and basic use

Curl and wget of Linux commands, curl and get have many similarities, such as the following downloads. To make a difference, curl is better at simulating web requests because it can customize various request parameters. Wget is better at downloading … Continue reading

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Linux crontab format and crontab examples

Linux crontab command is a command used to periodically execute programs. It uses the job scheduler cron to execute tasks. Crontab format: MIN HOUR DAY MON DOW CMD.
* linux crontab format;
* linux crontab command;
* Example

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