用户进程首先与一个监听程序进程通信,在专用环境中该进程会创建一个服务器进程。...3、BACKGROUND PROCESSES(后台进程)后台进程是Oracle的程序,在Oracle实例启动的时候启动,用来管理数据库的读写,恢复和监视等工作,例如PMON、SMON等进程。...在UNIX操作系统上,Oracle的后台进程对应于操作系统进
Nonetheless, we can use Bash and run it in pure POSIX mode if we are paranoid about portability and compatibility. Aside from that, if we write a sh script, it will most likely run on Bash without modification because Bash is backward-compatible withsh. bash的常用功能 使用man bash可以看到...
When this occurs the WSL becomes unresponsive and I can not open another terminal to obtain information on what is being run, or attempt to stop it. From Windows Task Manager, all that shows as a process is "bash". The process is not responsive to attempts to kill it. This occurs on ...
[dmtsai@study~]$ type[-tpa]name 选项与参数::不加任何选项与参数时,type 会显示出 name 是外部指令还是 bash 内建指令-t:当加入-t 参数时,type 会将 name 以底下这些字眼显示出他的意义:file:表示为外部指令;alias:表示该指令为命令别名所设定的名称;builtin:表示该指令为 bash 内建的指令功能;-p:如...
job (vim) back again. Note that the process is paused, so if you’re running something like tail on a file, the process will have some catching up to do. If you have multiple jobs running in the background fg 3 , for example, will resume the 3rd job. Don’t forget to run the ...
In Bash you can start new processes (theads) on the background simply by running a command with ampersand &. The wait command can be used to wait until all background processes have finished (to wait for a certain process do wait PID where PID is a process ID). So here’s a simple...
Nonetheless, we can use Bash and run it in pure POSIX mode if we are paranoid about portability and compatibility. Aside from that, if we write a sh script, it will most likely run on Bash without modification because Bash is backward-compatible withsh. ...
In the case that our standard output is going to the terminal then we just use exec to redirect our output to the desired log file, as before. If our output is not going to the terminal then we use coproc to run tee Running tee using the coproc statement is essentially the same as ...
(切换用户) cd:Change directory ls:List files ps:Process Status mkdir:Make directory rmdir:Remove directory mkfs: Make file system fsck:File system check uname: Unix name lsmod: List modules mv: Move file rm: Remove file cp: Copy file ln: Link files fg: Foreground bg: Background chown: ...
与号(Run job in background[ampersand])。 如果命令后面跟上一个&符号,这个命令将会在后台运行。有的时候,脚本中在一条在后台运行的命令可能会引起脚本挂起,等待输入,出现这种情况可以在原有的脚本后面使用wait命令来修复。 && || 逻辑操作符(logical operator)。