As you know, the recommended way for editing the/etc/sudoers file is with visudo. Visudo opens the /etc/sudoers file with the default text editor, and warns you if you save code with errors. Visudo reads the SUDO_EDITOR, VISUAL and EDITOR variables,…
The !$ trick works on bash, csh, tcsh and zsh, but does not work on ksh. The !$ trick is very usefull in the Linux and Unix shells. In the Bash shell, the !$ inserts (and expands) the last used…
In this article I will show you how to cd into a directory by only typing the directory name. To do this, you have to activate the autocd. For bash: shopt -s autocd $ ls -ld naboo drwxrwxr-x 2 razvan…
Traditionally, the default shell in the Unix systems is dash, for both the users and the system scripts. On GNU / Linux distros, bash has always been the default shell. Some new GNU / Linux distros use dash as the…
The Z shell (zsh) is a powerfull bash compatible shell. It can easily be installed on every Linux or Unix distro. In this article I will install zsh in FreeBSD and PCBSD and set zsh as the default login shell.…
The PATH is an environment variable that tells the shell where to look for the basic executables (commands) you use (such as ping, useradd, etc). Setting a new PATH depends on the shell, not on the Linux or Unix distro.…
As you know, all the files from /etc are very important for the Unix / Linux systems. The /etc/shells file contains a list of all the shells available in the system. Sample of /etc/shells file: $ cat /etc/shells # /etc/shells:…