Category: Linux Admin


‘od’: Write files in octal or other formats

‘od’ writes an unambiguous representation of each FILE (‘-‘ means standard input), or standard input if none are given.  Synopses:      od [OPTION]… [FILE]…      od [-abcdfilosx]… [FILE] [[+]OFFSET[.][b]]      od [OPTION]… –traditional [FILE] [[+]OFFSET[.][b] [[+]LABEL[.][b]]] Each line of output consists of the offset in the...


Linux Admin Reference – Device Mapper Multipath ( DM-Multipath) Configuration – Red Hat Enterprise Linux 6

In Enterprise Linux Environment, External storage often permits devices to be accessed by multiple physical paths. This improves redundancy and availability. SAN environment Red Hat Enterprise Linux provides the device-mapper-multipath component to manage multipath capable storage and to present multipath devices to applications running on the...


Configruing NTP Services in Linux ( RHEL5/6)

The NTP service is responsible for maintaining the system time, which is highly important in any  environment because so many things rely on time (logs, error messages, applications, and so on). There are a few different roles that your system can have when using NTP. They...


‘csplit’: Split a file into context-determined pieces

‘csplit’ creates zero or more output files containing sections of INPUT (standard input if INPUT is ‘-‘).  Synopsis:      csplit [OPTION]… INPUT PATTERN… The contents of the output files are determined by the PATTERN arguments as detailed below.  An error occurs if a PATTERN argument refers...


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