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38 FAQ tagged "shell"

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• How do I start Oracle service in UNIX?

  Q. I am using Solaris UNIX. How can I start Oracle service / server in UNIX from a shell prompt?
  A. In order to start Oracle service in UNIX you need to login as a Oracle user.
  Use su - command to login as oracle user.
  Start Oracle server in UNIX
  Type the following command, enter:
  $ su [...]

• Linux Copy File Command ( cp command examples )

  Q. How do I copy file under Linux? How do I make 2nd copy of a file?

• FreeBSD Mount CDROM / DVD Drive From The Command Prompt

  How do I mount the CDROM from FreeBSD shell or command line?

• Linux increase the maximum number of open files or file descriptors

  Q. How do I increase the maximum number of open files under CentOS Linux? How do I open more file descriptors under Linux?
  A. ulimit command provides control over the resources available to the shell and to processes started by it, on systems that allow such control. The maximum number of open file [...]

• Linux check memory usage

  Linux comes with different command to check memory usage. free command displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel.
  vmstat command reports information about processes, memory, paging, block IO, traps, and cpu activity.
  Then you can use [...]

• Howto Open a PDF file under Linux / FreeBSD

  PDF is an acronym for Portable Document Format. It is a proprietary file format developed by Adobe Systems for representing two-dimensional documents in a device independent and resolution independent format. You can open pdf file using graphical as well as command line tools (i.e. without GUI). Linux supports following PDF viewer under X window:

  Gnome pdf [...]

• FreeBSD: Set date time and timezone

  Q. How do I setup date and time in FreeBSD operating system at a shell prompt?
  A. Under FreeBSD you can use date command to display or set date and time. The date command displays the date and time read from the kernel clock. If you just type date command without any options (read as without [...]

• Restrict ssh access using tcpd (TCPWrapper)

  tcpd is use to access control facility for internet services. The tcpd program can be set up to monitor incoming requests for telnet, finger, ftp, exec, rsh, rlogin, tftp, sshd and other services that have a one-to-one mapping onto executable files. Your sshd server must be configuring (compiled [...]

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