Bash

Verificar quais shell são disponíveis no sistema

[user]$ more /etc/shells
/bin/sh
/bin/bash
/sbin/nologin
/bin/zsh

/bin/bash

The program /bin/bash uses a set of startup files in /etc or an equivalent file in your home directory.

• Interactive login shell: /bin/login
  • after reading /etc/passwd file
  • reads /etc/profile
  • reads ~/.bash_profile

• Interactive non-login shell: at the command-line using a shell program (e.g., [prompt]$/bin/bash) or by the /bin/su command. An interactive non-login shell is also started with a terminal program such as xterm or konsole from within a graphical environment.
  • Normally copies the parent environment
  • reads ~/.bashrc

• Non-interactive shell: usually present when a shell script is running. Only the environment inherited from the parent shell is used.

• ~/.bash_logout: read and executed when a user exits from an interactive login shell.

• /etc/bashrc : for system wide initialization of non-login shells. This file is usually called from the user's ~/.bashrc file and is not built directly into bash itself. This convention is followed in this section.

• Personalizando e Colorindo o Prompt do Bash

/etc/profile

Alguns arquivos importantes:

colorls.sh    % ls colorido
lang.sh       % definicoes do charset usado, LANG, LC_CTYPE
mpich2.sh     % module load mpich2-x86_64
vim.sh        % para o vi
shell-colors  % ADICIONADO. Contém atalhos para cores e o comando para mudar a cor do prompt
              % PS1="${BOLDYELLOW}\u${BOLDWHITE}@${BOLDGREEN}\h ${BOLDBLUE}\W \$ ${COLOR_RESET}"