Archive for the 'AIX' Category

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Linux / UNIX: displays a calendar and the date of easter with cal command
Q. date command displays date and time under a shell? How do I display calendar under Linux or UNIX?
A. date displays the Linux or UNIX system current date and time. The cal command displays a simple calendar in traditional format and ncal offers an alternative layout, more options and the date of easter. [...]
Linux / UNIX: Device files
Q. Can you explain me what is device files and how do I access or see device files? Why UNIX / Linux has device files?
A. Under Linux and UNIX each and every hardware device treated as a file. A device file allows to accesses hardware devices so that end users do not need to [...]
UNIX / Linux: Absolute Pathnames
Q. Can you explain the term absolute pathname under UNIX or Linux oses?
A. An absolute pathname, is the location of a filesystem object relative to the root directory. All absolute pathnames always begin with a slash (/). With Absolute pathname you have access to complete file system objects such as directories and files.
Absolute [...]
Clear mysql command line history stored in ~/.mysql_history file
Q. How do I clear the mysql command line history stored in ~/.mysql_history file?
A. mysql is a simple SQL shell. It supports interactive and non-interactive use.
On Unix and Linux, the mysql client writes a record of executed statements to a history file. By default, the history file is named .mysql_history and is created in your [...]
Howto find out AIX UNIX CPU information, clock speed
Q. How do I find out CPU information under AIX UNIX?
A. You can use graphical system administration tool for the IBM AIX computer operating system called SMIT.
AIX Commands
Following commands can be used.
lscfg command
lscfg - Displays configuration, diagnostic, and vital product data (VPD) information about the system including CPU information:
lscfg
Determining CPU Speed
When using AIX 5.1 and [...]
Linux / UNIX advantage of creating soft links instead of copy a file
Q. What is the main advantage of creating soft / hard links to a file instead of copies of the file?
A. To make links between files you use ln command. To copy a file you use cp command. The main advantage is access permission. If you want to change the permissions for a a file [...]
What command do you run to check file system consistency under UNIX or Linux?
Q. What command I need to run to check file system consistency under UNIX or Linux like operating systems?
A. You need to run fsck [file system consistency check] command to check file system consistency and repair a Linux / UNIX file system. Microsoft Windows/DOS equivalent programs are scandisk and chkdsk.
Normally, the fsck program will [...]
Howto find out AIX UNIX RAM size memory from command line
Q. How do I find out the memory size of my AIX UNIX server? Can you tell us the command name to do the same?
A. You need to use bootinfo command to determines and displays various boot information, including boot device type and boot device name.
Command to check RAM in AIX UNIX
The bootinfo command [...]
What does a plus + at the beginning of a line in the /etc/passwd UNIX / Linux password file signify?
Q. I’m new to UNIX and we are using HP-UX and Solaris system here. What does a plus (+) or a minus (-) at the beginning of a line in the password (/etc/passwd) file signify?
A. The /etc/passwd file under UNIX/Linux operating system can have + or – minus symbol. The password file can contain entries [...]
Find subnet mask on UNIX
Q. How do I find out subnet mask on UNIX operating system? Can you tell us the name of command and configuration file to store subnetmask under UNIX?
A. A subnetwork/ subnet is a range of logical addresses within the address space that is assigned to an organization. Subnetting is a hierarchical partitioning of the [...]