btrfs–otime JFS -di_otime The above fields store data in the fileinode. There are 3 different ways to get file creation date/time in Bash. The first is very crude (non-technical) and can work with old operating
The kernel usually sets its time based on the RTC at boot time, and you can reset the system clock to the current hardware time with hwclock. Keep your hardware clock in Universal Coordinated Time (UTC) in order to avoid any trouble with time zone or daylight savings time corrections. You...
Most of the time when you run a script, you're concerned with its immediate results. Sometimes, though, the task is complex or needs to execute at a particul...
Speaking of editing, it’s time to learn an editor. To get serious withUnix, you must be able to edit text files without damaging them. Most parts of the system use plaintext configuration files (like the ones in /etc). It’s not difficult to edit files, but you will do it so oft...
In this tutorial, we’ll explore how to compare time inBash. 2. Sample Task Let’s supposewe wish to write a Bash scriptcheck_time.shthat outputs a different message depending on the time of day: if the current time is between9:00 AMand5:00 PM, we’d like the script to print the...
We’ll look at how to get a summary of the hosts’ connections and the current connection count. The commands in this article have been tested on SUSE 15 and Debian 11.6, using GNU Bash version 4.4.23. All code snippets should work in most Linux environments. 2. The ss Command A ...
Runtime ErrorA Runtime Error will be the next level of errors. The shell script runs with no syntax errors but fails to execute reliably certain tasks. The most common runtime errors in a shell script include: Division by zero or use of a string/float variable in a Bash Arithmetic Expres...
It works most of the time, but sometimes it mysteriously fails. Why? The answer is probably in your current directory. If that directory contains files with names such as r.input and r.output, then the shell expands r.*t to r.input r.output and creates this command: ...
如果你在使用本章作为Unix账户的指南,并且你不是系统管理员,则bash可能不是你的默认Shell。 你可以使用chsh命令更改你的Shell,或者向系统管理员寻求帮助。 2.2 Use Shell(使用 Shell) When you install Linux, you should create at least one regular user in addition to the root user; this will be your ...
Bash Copy This is a basic way to install Bash in Linux, but there’s much more to learn about installing and using Bash. Continue reading for more detailed information and advanced usage scenarios. Table of Contents[hide] Understanding the Bash Shell and its Installation ...