BASH at CFHT
Bash is installed on all Solaris, HP-UX, and older SunOS machines at CFHT.
The main advantages of bash are that it is a very fast, stable, and full
featured command shell. At any time, you can type the command "bash"
to enter the shell. (If /usr/local/bin is not in your PATH, then you may
have to type "/usr/local/bin/bash"). In bash's interactive mode,
the backspace will
work correctly, the arrow keys will allow you to edit previous commands,
and TAB will complete partially typed commands or filenames. (See the
info pages for info on changing these bindings.)
Our version of bash is set up so that it first looks at
/apps/gnu/share/bash.rc (or /apps/gnu/share/bash.profile
for "login" shells, but they are the same file). The system-wide
bash.rc will install a few aliases for you, but you may want to add
aliases or environment variables in a file in your home directory called
Or, if you want to provide your own aliases in place of the ones
in the system default, first copy the system default to your home directory
and then make any modifications you want. The system bash.rc file will
use your .bash-aliases instead of the default one in /apps/gnu/share/.
cp /apps/gnu/share/bash-aliases ~/.bash-aliases
If you create a .bashrc, I recommend making a symlink to it with:
So that login shells will behave the same as other shells. (The distinction
between login and non-login shells has been abused to the point where
it is simplest to just operate them identically, in my opinion.)
ln -s .bashrc ~/.bash_login
PLEASE NOTE: The syntax for setting aliases is:
Which may be different from what you are used to. If you copy alias
settings used with another shell, be sure you translate them to this
alias command="command -alias ..."
As mentioned above, you can set and/or export environment variables
in your .bashrc, but it is NOT recommended to mess with the following:
- This one will get set by whichever terminal emulator
(Xterm, rxvt, hpterm) that the shell is running in, so you should
never have to set it. When no TERM is set (which may happen if you
connect from home with a Windows terminal, for example) the system-wide
bash.rc will set TERM to "vt100" for you, which works for the
vast majority of terminal types.
- If you are using FVWM, this one will always be set correctly by
the session startup. To create a window on another computer, with
the DISPLAY already set up automatically, use the
"makehost hostname" command, or the root
menus of the window manager and you should not have to set the DISPLAY.
- The default path includes "." and then
"$HOME/bin/". So, if you have personal stuff
installed in your home directory which you want to have
searched first, you don't have to change anything as long as
you put the programs (or links to them) in $HOME/bin.
To add other paths, rather than resetting the default PATH,
the following is recommended. Let's say you wanted to add
$HOME/usr/bin to your PATH. Add this to your .bashrc:
The csh syntax using "setenv" will also work. To find out where in your
path a particular command is being found by bash, you can use the builtin
type. For example:
> type -a ls
ls is an alias for ls -sF
ls is /bin/ls
Choosing Bash as your default shell
If you would like to get "bash" by default, any time you log on or
telnet/rlogin to a machine, you will have to log on to "uwila" and
use the chsh command to change your default login shell.
Issue the command "chsh username", where username is your login.
Then enter the full path "/apps/gnu/bin/bash"
and then your password. The next time you log in, you should get
the bash prompt automatically:
> chsh isani
Changing NIS login shell for isani on uwila.
Old shell: /bin/csh
New shell: /apps/gnu/bin/bash
NIS entry changed on uwila
Note about FTP
FTP on some machines may only accept connections for users who are using
a shell that is listed in the file /etc/shells. If you are
having trouble ftp-ing to a machine that does not have /apps/gnu/bin/bash
listed in its /etc/shells, please ask Bob or Sidik to add it
and everything should work fine.
The rest of the information in the Bash info pages
will help guide you if you want to get fancier with it.