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Интерактивная система просмотра системных руководств (man-ов)

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unset (1)
  • unset (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • >> unset (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • unset (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • unset (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )

  • BSD mandoc
     

    NAME

    
    
    builtin
    
     
    !
    
     
    %
    
     
    .
    
     
    :
    
     
    @
    
     
    {
    
     
    }
    
     
    alias
    
     
    alloc
    
     
    bg
    
     
    bind
    
     
    bindkey
    
     
    break
    
     
    breaksw
    
     
    builtins
    
     
    case
    
     
    cd
    
     
    chdir
    
     
    command
    
     
    complete
    
     
    continue
    
     
    default
    
     
    dirs
    
     
    do
    
     
    done
    
     
    echo
    
     
    echotc
    
     
    elif
    
     
    else
    
     
    end
    
     
    endif
    
     
    endsw
    
     
    esac
    
     
    eval
    
     
    exec
    
     
    exit
    
     
    export
    
     
    false
    
     
    fc
    
     
    fg
    
     
    filetest
    
     
    fi
    
     
    for
    
     
    foreach
    
     
    getopts
    
     
    glob
    
     
    goto
    
     
    hash
    
     
    hashstat
    
     
    history
    
     
    hup
    
     
    if
    
     
    jobid
    
     
    jobs
    
     
    kill
    
     
    limit
    
     
    local
    
     
    log
    
     
    login
    
     
    logout
    
     
    ls-F
    
     
    nice
    
     
    nohup
    
     
    notify
    
     
    onintr
    
     
    popd
    
     
    printenv
    
     
    pushd
    
     
    pwd
    
     
    read
    
     
    readonly
    
     
    rehash
    
     
    repeat
    
     
    return
    
     
    sched
    
     
    set
    
     
    setenv
    
     
    settc
    
     
    setty
    
     
    setvar
    
     
    shift
    
     
    source
    
     
    stop
    
     
    suspend
    
     
    switch
    
     
    telltc
    
     
    test
    
     
    then
    
     
    time
    
     
    times
    
     
    trap
    
     
    true
    
     
    type
    
     
    ulimit
    
     
    umask
    
     
    unalias
    
     
    uncomplete
    
     
    unhash
    
     
    unlimit
    
     
    unset
    
     
    unsetenv
    
     
    until
    
     
    wait
    
     
    where
    
     
    which
    
     
    while
    
     - shell built-in commands
    
     
    

    SYNOPSIS

    See the built-in command description in the appropriate shell manual page.  

    DESCRIPTION

    Shell builtin commands are commands that can be executed within the running shell's process. Note that, in the case of csh(1) builtin commands, the command is executed in a subshell if it occurs as any component of a pipeline except the last.

    If a command specified to the shell contains a slash `/' , the shell will not execute a builtin command, even if the last component of the specified command matches the name of a builtin command. Thus, while specifying ``echo '' causes a builtin command to be executed under shells that support the echo builtin command, specifying ``/bin/echo '' or ``./echo '' does not.

    While some builtin commands may exist in more than one shell, their operation may be different under each shell which supports them. Below is a table which lists shell builtin commands, the standard shells that support them and whether they exist as standalone utilities.

    Only builtin commands for the csh(1) and sh(1) shells are listed here. Consult a shell's manual page for details on the operation its builtin commands. Beware that the sh(1) manual page, at least, calls some of these commands ``built-in commands'' and some of them ``reserved words'' Users of other shells may need to consult an info(1) page or other sources of documentation.

    Commands marked ``No** '' under External do exist externally, but are implemented as scripts using a builtin command of the same name.

    Command    External Ta csh(1)TaXrsh1

    ! Ta Ta Ta Yes
    % Ta Ta Yes Ta
    . Ta Ta Ta Yes
    : Ta Ta Yes Ta Yes
    @ Ta Ta Yes Ta Yes
    { Ta Ta Ta Yes
    } Ta Ta Ta Yes
    alias Ta No** Ta Yes Ta Yes
    alloc Ta Ta Yes Ta
    bg Ta No** Ta Yes Ta Yes
    bind Ta Ta Ta Yes
    bindkey Ta Ta Yes Ta
    break Ta Ta Yes Ta Yes
    breaksw Ta Ta Yes Ta
    builtin Ta Ta Ta Yes
    builtins Ta Ta Yes Ta
    case Ta Ta Yes Ta Yes
    cd Ta No** Ta Yes Ta Yes
    chdir Ta Ta Yes Ta Yes
    command Ta No** Ta Ta Yes
    complete Ta Ta Yes Ta
    continue Ta Ta Yes Ta Yes
    default Ta Ta Yes Ta
    dirs Ta Ta Yes Ta
    do Ta Ta Ta Yes
    done Ta Ta Ta Yes
    echo Ta Yes Ta Yes Ta Yes
    echotc Ta Ta Yes Ta
    elif Ta Ta Ta Yes
    else Ta Ta Yes Ta Yes
    end Ta Ta Yes Ta
    endif Ta Ta Yes Ta
    endsw Ta Ta Yes Ta
    esac Ta Ta Ta Yes
    eval Ta Ta Yes Ta Yes
    exec Ta Ta Yes Ta Yes
    exit Ta Ta Yes Ta Yes
    export Ta Ta Ta Yes
    false Ta Yes Ta Ta Yes
    fc Ta No** Ta Ta Yes
    fg Ta No** Ta Yes Ta Yes
    filetest Ta Ta Yes Ta
    fi Ta Ta Ta Yes
    for Ta Ta Ta Yes
    foreach Ta Ta Yes Ta
    getopts Ta No** Ta Ta Yes
    glob Ta Ta Yes Ta
    goto Ta Ta Yes Ta
    hash Ta Ta Ta Yes
    hashstat Ta Ta Yes Ta
    history Ta Ta Yes Ta
    hup Ta Ta Yes Ta
    if Ta Ta Yes Ta Yes
    jobid Ta Ta Ta Yes
    jobs Ta No** Ta Yes Ta Yes
    kill Ta Yes Ta Yes Ta
    limit Ta Ta Yes Ta
    local Ta Ta Ta Yes
    log Ta Ta Yes Ta
    login Ta Yes Ta Yes Ta
    logout Ta Ta Yes Ta
    ls-F Ta Ta Yes Ta
    nice Ta Yes Ta Yes Ta
    nohup Ta Yes Ta Yes Ta
    notify Ta Ta Yes Ta
    onintr Ta Ta Yes Ta
    popd Ta Ta Yes Ta
    printenv Ta Yes Ta Yes Ta
    pushd Ta Ta Yes Ta
    pwd Ta Yes Ta Ta Yes
    read Ta No** Ta Ta Yes
    readonly Ta Ta Ta Yes
    rehash Ta Ta Yes Ta
    repeat Ta Ta Yes Ta
    return Ta Ta Ta Yes
    sched Ta Ta Yes Ta
    set Ta Ta Yes Ta Yes
    setenv Ta Ta Yes Ta
    settc Ta Ta Yes Ta
    setty Ta Ta Yes Ta
    setvar Ta Ta Ta Yes
    shift Ta Ta Yes Ta Yes
    source Ta Ta Yes Ta
    stop Ta Ta Yes Ta
    suspend Ta Ta Yes Ta
    switch Ta Ta Yes Ta
    telltc Ta Ta Yes Ta
    test Ta Yes Ta Ta Yes
    then Ta Ta Ta Yes
    time Ta Yes Ta Yes Ta
    times Ta Ta Ta Yes
    trap Ta Ta Ta Yes
    true Ta Yes Ta Ta Yes
    type Ta Ta Ta Yes
    ulimit Ta Ta Ta Yes
    umask Ta No** Ta Yes Ta Yes
    unalias Ta No** Ta Yes Ta Yes
    uncomplete Ta Ta Yes Ta
    unhash Ta Ta Yes Ta
    unlimit Ta Ta Yes Ta
    unset Ta Ta Yes Ta Yes
    unsetenv Ta Ta Yes Ta
    until Ta Ta Ta Yes
    wait Ta No** Ta Yes Ta Yes
    where Ta Ta Yes Ta
    which Ta Yes Ta Yes Ta
    while Ta Ta Yes Ta Yes

     

    SEE ALSO

    csh(1), echo(1), false(1), info(1), kill(1), login(1), nice(1), nohup(1), printenv(1), pwd(1), sh(1), test(1), time(1), true(1), which(1)  

    HISTORY

    The manual page first appeared in Fx 3.4 .  

    AUTHORS

    This manual page was written by An Sheldon Hearn Aq sheldonh@FreeBSD.org .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    SEE ALSO
    HISTORY
    AUTHORS


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