新裝的Ubuntu,安裝了jdk,在/etc/profile文件中也配置了環境變量,但是奇怪的事情發生了,當執行:
java -version
時,沒有任何問題,但執行:
sudo java -version
時,卻報錯:
sudo: java: command not found
在網上搜索到解決方案:
1、執行命令:
sudo visudo
打開/etc/sudoers文件:
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL=(ALL:ALL) ALL
注意:用vi 直接打開/etc/sudoers無法編輯
2、將java的bin目錄加入到secure_path配置中:
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/opt/jdk1.8.0_221/bin"
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL=(ALL:ALL) ALL
3、用Ctrl+X退出,並選擇保存
通過以上操作後,問題得到了解決。
但是爲什麼呢,原來是因爲secure_path定義了使用sudo時PATH環境變量的值,那麼如果不定義呢,是否sudo時PATH的值就是本來環境變量的值呢。
抱着刨根問底的精神,我試着將secure_path那行註釋掉,然後我發現這個時候sudo能用任何命令了。