在Ubuntu Linux上,使用Bash登录时,我已经在/etc/profile中设置了只读变量。
下面是我的/etc/profile文件(我的添加在文件底部):
我的第一个问题是为什么会有这么多“PATH: readonly variable”消息,而且还带有完整的输出(15+)?我的第二个问题是如何停止这些消息在登录时显示。
提前感谢任何帮助!
# Check for interactive bash and that we haven't already been sourced.
[ -z "$BASH_VERSION" -o -z "$PS1" -o -n "$BASH_COMPLETION" ] && return
# Check for recent enough version of bash.
bash=${BASH_VERSION%.*}; bmajor=${bash%.*}; bminor=${bash#*.}
if [ $bmajor -gt 3 ] || [ $bmajor -eq 3 -a $bminor -ge 2 ]; then
if shopt -q progcomp && [ -r /etc/bash_completion ]; then
# Source completion code.
. /etc/bash_completion
fi
fi
unset bash bmajor bminor
# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).
TZ='America/Kentucky/Louisville'; export TZ
if [ -d /etc/profile.d ]; then
for i in /etc/profile.d/*.sh; do
if [ -r $i ]; then
. $i
fi
done
unset i
fi
if [ "$PS1" ]; then
if [ "$BASH" ]; then
PS1='\u@\h:\w\$ '
if [ -f /etc/bash.bashrc ]; then
. /etc/bash.bashrc
fi
else
if [ "`id -u`" -eq 0 ]; then
PS1='# '
else
PS1='$ '
fi
fi
fi
**# My Additions**
umask 077
shopt -s histappend
shopt -s histverify
export HISTFILE=~/.bash_history
export HISTFILESIZE=1000000000
export HISTSIZE=5000
export HISTCONTROL=""
export HISTIGNORE=""
export HISTTIMEFORMAT="%F %T"
readonly HISTFILE
readonly HISTFILESIZE
readonly HISTSIZE
readonly HISTCONTROL
readonly HISTIGNORE
readonly HISTTIMEFORMAT
readonly HISTCMD
readonly HOME
readonly PATH
echo -e "Subject: Login from $(/usr/bin/whoami) on $(/bin/hostname) at $(/bin/date)\n\n$(/usr/bin/last -n 10 -F)\n" \
| /usr/sbin/ssmtp user@company.com
export PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND ; }"'echo "$$ $USER $(history 1)"|/usr/bin/logger -p user.alert -t shell.log'
readonly PROMPT_COMMAND
以下是位于 /etc/profile.d 的 bash_completion 文件:
# Check for interactive bash and that we haven't already been sourced.
[ -z "$BASH_VERSION" -o -z "$PS1" -o -n "$BASH_COMPLETION" ] && return
# Check for recent enough version of bash.
bash=${BASH_VERSION%.*}; bmajor=${bash%.*}; bminor=${bash#*.}
if [ $bmajor -gt 3 ] || [ $bmajor -eq 3 -a $bminor -ge 2 ]; then
if shopt -q progcomp && [ -r /etc/bash_completion ]; then
# Source completion code.
. /etc/bash_completion
fi
fi
unset bash bmajor bminor
我的问题是,当我登录时,在提示符出现之前,我会“淹没”大量的bash消息:
....
-bash: PATH: readonly variable
-bash: PATH: readonly variable
-bash: PATH: readonly variable
-bash: PATH: readonly variable
-bash: HISTFILE: readonly variable
-bash: HISTFILESIZE: readonly variable
-bash: HISTSIZE: readonly variable
-bash: HISTCONTROL: readonly variable
-bash: HISTIGNORE: readonly variable
-bash: HISTTIMEFORMAT: readonly variable
-bash: PROMPT_COMMAND: readonly variable
我的第一个问题是为什么会有这么多“PATH: readonly variable”消息,而且还带有完整的输出(15+)?我的第二个问题是如何停止这些消息在登录时显示。
提前感谢任何帮助!