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bg(1) [osf1 man page]

bg(1)							      General Commands Manual							     bg(1)

NAME
bg - Runs jobs in the background SYNOPSIS
bg [job_id...] Note The C shell has a built-in version of the bg command. If you are using the C shell, and want to guarantee that you are using the command described here, you must specify the full path /usr/bin/bg. See the csh(1) reference page for a description of the built-in command. STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: bg: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None OPERANDS
Specifies the job to be resumed as a background job. If no job_id operand is given, the most recently suspended job is used. The format of job_id is described in the Jobs section of the ksh(1) reference page. DESCRIPTION
If job control is enabled (see the description of set -m in the ksh(1) reference page), the bg utility resumes suspended jobs from the cur- rent environment by running them as background jobs. If the job specified by job_id is a job already running in the background, the bg utility has no effect and will exit successfully. Using bg to place a job into the background causes its process ID to become "known in the current shell execution environment", as if it had been started as an asynchronous list. See the Jobs section of the ksh(1) reference page. RESTRICTIONS
If job control is disabled, the bg utility exits with an error and no job is placed in the background. The bg utility does not work as expected when it is operating in its own utility execution environment because that environment has no suspended jobs. EXIT STATUS
The following exit values are returned: Successful completion. An error occurred. ENVIRONMENT VARIABLES
The following environment variables affect the execution of bg: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale used to affect the format and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: csh(1), fg(1), jobs(1), kill(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p), wait(1) Standards: standards(5) bg(1)

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hash(1) 						      General Commands Manual							   hash(1)

NAME
hash - Remembers or reports utility locations SYNOPSIS
hash [utility] hash -r STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: hash: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
Forgets all previously remembered utility locations. OPERANDS
The name of a utility to be searched for and added to the list of remembered locations. If utility contains one or more slashes, the results are unspecified. DESCRIPTION
The hash utility affects the way the current shell environment remembers the locations of utilities found. Depending on the arguments spec- ified, it adds utility locations to its list of remembered locations or it purges the contents of the list. When no arguments are specified, hash reports on the contents of the list. This list consists of those utilities named in previous hash invocations that have been invoked, and those invoked and found through the normal command search process. This list includes the path name of each utility in the list of remembered locations for the current shell environment. NOTES
The use of hash with utility names is unnecessary for most applications, but may provide a performance improvement. The effects of hash -r can also be achieved by resetting the value of PATH. RESTRICTIONS
If hash is called in a separate utility execution environment, such as one of the following it will not affect the command search process of the caller's environment. nohup hash -r find . -type f | xargs hash Utilities provided as built-ins to the shell are not reported by hash. EXIT STATUS
The following exit values are returned: Successful completion. An error occurred. ENVIRONMENT VARIABLES
The following environment variables affect the execution of hash: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contains an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale that should be used to affect the format and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. Determines the location of name. SEE ALSO
Commands: command(1), type(1) Standards: standards(5) hash(1)

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