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50分!基础问题!
来源: 互联网 发布时间:2016-07-16
本文导语: 在界面下登录linux会不会调用 .bash_profile? 如果调用的化,那比如我在.bash_profile下入交互的东西: anwser="" while [ "$anwser" = "" ] do echo "select sub system code[1:A,2:B,3:C]:" read anwser if [ "$anwser" = "" ...
在界面下登录linux会不会调用 .bash_profile?
如果调用的化,那比如我在.bash_profile下入交互的东西:
anwser=""
while [ "$anwser" = "" ]
do
echo "select sub system code[1:A,2:B,3:C]:"
read anwser
if [ "$anwser" = "" ]; then
continue
fi
case "$anwser" in
1)
echo "enter into fcs now!"
. $HOME/sbin/aaaa
;;
2)
echo "enter into fep now!"
. $HOME/fep/sbin/aaaa
;;
3)
echo "enter into frs now!"
. $HOME/frs/sbin/aaaa
;;
*)
echo "invalid select"
anwser=""
continue
;;
esac
break;
done
那么在界面下这些交互的东东怎么实现?
还是在界面下登录根本不调用.bash_profile?
我通过securecrt登录,跟界面登录现在的区别是很多环境变量比如在aaaa下定义的alias没有生效,请高手指点?
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一个是登录shell,一个是普通的交互式shell
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1. 把需要的东东加到$HOME/.bashrc里
或者:
2.
2.1. 在$HOME/.bash_profile里加
2.2 把需要的东东加到$HOME/.your_bashrc里
原理如下:
或者:
2.
2.1. 在$HOME/.bash_profile里加
export BASH_ENV=$HOME/.your_bashrc
if [ -f "$BASH_ENV" -a -r "$BASH_ENV" ]; then . "$BASH_ENV"; fi
2.2 把需要的东东加到$HOME/.your_bashrc里
原理如下:
A login shell is one whose first character of argument zero is a -, or
one started with the --login option.
An interactive shell is one started without non-option arguments and
without the -c option whose standard input and output are both con-
nected to terminals (as determined by isatty(3)), or one started with
the -i option. PS1 is set and $- includes i if bash is interactive,
allowing a shell script or a startup file to test this state.
The following paragraphs describe how bash executes its startup files.
If any of the files exist but cannot be read, bash reports an error.
Tildes are expanded in file names as described below under Tilde Expan-
sion in the EXPANSION section.
When bash is invoked as an interactive login shell, or as a non-inter-
active shell with the --login option, it first reads and executes com-
mands from the file /etc/profile, if that file exists. After reading
that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile,
in that order, and reads and executes commands from the first one that
exists and is readable. The --noprofile option may be used when the
shell is started to inhibit this behavior.
When a login shell exits, bash reads and executes commands from the
file ~/.bash_logout, if it exists.
When an interactive shell that is not a login shell is started, bash
reads and executes commands from ~/.bashrc, if that file exists. This
may be inhibited by using the --norc option. The --rcfile file option
will force bash to read and execute commands from file instead of
~/.bashrc.
When bash is started non-interactively, to run a shell script, for
example, it looks for the variable BASH_ENV in the environment, expands
its value if it appears there, and uses the expanded value as the name
of a file to read and execute. Bash behaves as if the following com-
mand were executed:
if [ -n "$BASH_ENV" ]; then . "$BASH_ENV"; fi
but the value of the PATH variable is not used to search for the file
name.