-R 120 -d 0 -e 0
命令中的命令是什么/usr/bin/yum -y -R 120 -d 0 -e 0 update yum
?
我正在尝试在 bash 脚本中运行此命令作为教程。我想了解-R 120 -d 0 -e 0
yum 命令中的作用。
答案1
所有选项的含义都写在manpage中:
-R, --randomwait=[time in minutes]
Sets the maximum amount of time yum will wait before performing a command -
it randomizes over the time.
-d, --debuglevel=[number]
Sets the debugging level to [number] - turns up or down the amount of things
that are printed. Practical range: 0 - 10
-e, --errorlevel=[number]
Sets the error level to [number] Practical range 0 - 10. 0 means print only critical
errors about which you must be told. 1 means print all errors, even ones that are
not overly important. 1+ means print more errors (if any) -e 0 is good for cron jobs.
因此,在随机等待长达 2 小时后/usr/bin/yum -y -R 120 -d 0 -e 0 update yum
更新包,仅打印严重错误。yum