Dove posso trovare tutta la documentazione per i comandi della shell incorporata di mac?

Question

Dove posso trovare tutta la documentazione per i comandi della shell incorporata di mac?

#1 da (7 voti)

4

La OS X Man Pages elenca tutte le funzioni integrate. Ma dove posso trovare la documentazione di un particolare?

Per esempio, il comando fc , su ubuntu posso ottenere il suo manuale da:

> help fc
fc: fc [-e ename] [-lnr] [first] [last] or fc -s [pat=rep] [command]
Display or execute commands from the history list.

fc is used to list or edit and re-execute commands from the history list.
FIRST and LAST can be numbers specifying the range, or FIRST can be a
string, which means the most recent command beginning with that
string.
....

Un altro esempio è l'espressione if , su ubuntu:

> help if
if: if COMMANDS; then COMMANDS; [ elif COMMANDS; then COMMANDS; ]... [ else COMMANDS; ] fi
Execute commands based on conditional.
...

Cosa mi manca qui?

command-line terminal

posta user2829759 21.02.2017 - 07:05

fonte

1 risposta

Leggi altre domande sui tag command-line terminal

Come estrarre un file compresso .ace? Come inserire intestazioni orizzontali a pagine in pagine Apple

score 7 · Accepted Answer

Fai la stessa identica cosa.

...

$ help if
if: if COMMANDS; then COMMANDS; [ elif COMMANDS; then COMMANDS; ]... [ else COMMANDS; ] fi
    The 'if COMMANDS' list is executed.  If its exit status is zero, then the
    'then COMMANDS' list is executed.  Otherwise, each 'elif COMMANDS' list is
    executed in turn, and if its exit status is zero, the corresponding
    'then COMMANDS' list is executed and the if command completes.  Otherwise,
    the 'else COMMANDS' list is executed, if present.  The exit status of the
    entire construct is the exit status of the last command executed, or zero
    if no condition tested true.

Oppure ...

$ help fc
fc: fc [-e ename] [-nlr] [first] [last] or fc -s [pat=rep] [cmd]
    fc is used to list or edit and re-execute commands from the history list.
    FIRST and LAST can be numbers specifying the range, or FIRST can be a
    string, which means the most recent command beginning with that
    string.

       -e ENAME selects which editor to use.  Default is FCEDIT, then EDITOR,
          then vi.

       -l means list lines instead of editing.
       -n means no line numbers listed.
       -r means reverse the order of the lines (making it newest listed first).

    With the 'fc -s [pat=rep ...] [command]' format, the command is
    re-executed after the substitution OLD=NEW is performed.

    A useful alias to use with this is r='fc -s', so that typing 'r cc'
    runs the last command beginning with 'cc' and typing 'r' re-executes
    the last command.