One of the common tasks you'll encounter when scripting in Bash is performing arithmetic operations on variables, particularly division. This process might seem straightforward, but it requires ...

今回は、bashが標準的に利用するシェル変数を解説する。bashは、コマンドラインを制御するためのシェルであると同時にスクリプト作成のためのプログラミング言語でもある。シェル変数とは、bashという言語が持つ変数を指す。 変数なので、ユーザーが自由 ...

Linux 101: What are environment variables? Your email has been sent Jack Wallen introduces you to Linux environment variables. What are they and how are they set and ...

Ever wondered why programming in Bash is so difficult? Bash employs the same constructs as traditional programming languages; however, under the hood, the logic is rather different. The Bourne-Again ...

Variables often look like $var, but they also look like $1, $*, $? and $$. Let's take a look at what all these $ values can tell you. A lot of important values are ...

Linuxでシェルスクリプトと言うと「/bin/sh」が使われていることが多い。この「/bin/sh」、見た目は同じでもその実態は、実は ...

In our first tutorial on command line wizardry, we covered simple redirection and the basics of sed, awk, and grep. Today, we’re going to introduce the concepts of simple variable substitution and ...

Are you currently learning Bash? Have you seen things like $0 and $EUID and wondered what they mean? Or what the difference is between $UID and $EUID? I'll cover ...