Rrc en 21:53 14 feb 2014

2014-02-14T21:53:34Z

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__NOTOC__
* [[:#history | history]]

== history ==

<syntaxhighlight lang="bash">

history [n]
history -c
history -d offset
history -anrw [filename]
history -p arg [arg ...]
history -s arg [arg ...]
With no options, display the command history list with line num‐
bers. Lines listed with a * have been modified. An argument of
n lists only the last n lines. If the shell variable HISTTIME‐
FORMAT is set and not null, it is used as a format string for
strftime(3) to display the time stamp associated with each dis‐
played history entry. No intervening blank is printed between
the formatted time stamp and the history line. If filename is
supplied, it is used as the name of the history file; if not,
the value of HISTFILE is used. Options, if supplied, have the
following meanings:
-c Clear the history list by deleting all the entries.
-d offset
Delete the history entry at position offset.
-a Append the ``new'' history lines (history lines entered
since the beginning of the current bash session) to the
history file.
-n Read the history lines not already read from the history
file into the current history list. These are lines
appended to the history file since the beginning of the
current bash session.
-r Read the contents of the history file and use them as the
current history.
-w Write the current history to the history file, overwrit‐
ing the history file's contents.
-p Perform history substitution on the following args and
display the result on the standard output. Does not
store the results in the history list. Each arg must be
quoted to disable normal history expansion.
-s Store the args in the history list as a single entry.
The last command in the history list is removed before
the args are added.

If the HISTTIMEFORMAT variable is set, the time stamp informa‐
tion associated with each history entry is written to the his‐
tory file, marked with the history comment character. When the
history file is read, lines beginning with the history comment
character followed immediately by a digit are interpreted as
timestamps for the previous history line. The return value is 0
unless an invalid option is encountered, an error occurs while
reading or writing the history file, an invalid offset is sup‐
plied as an argument to -d, or the history expansion supplied as
an argument to -p fails.

[rrc@Llawyr ~]$ history
1 okular Downloads/2014013331452638NGELO$1$.pdf
2 ls -al *.pdf
3 ls -al Downloads/*.pdf
4 ssh myrddin
5 su -
6 cd ComandosDeLaTerminal/
7 vi Source
8 bash Source
9 echo $MiVariable
10 cat Source
11 echo $TuVariable
12 . /Source
13 . ./Source
.
[rrc@Llawyr ~]$ history -d 3
[rrc@Llawyr ~]$ history
1 okular Downloads/2014013331452638NGELO$1$.pdf
2 ls -al *.pdf
3 ssh myrddin
4 su -
5 cd ComandosDeLaTerminal/
6 vi Source
7 bash Source
8 echo $MiVariable
9 cat Source
10 echo $TuVariable
11 . /Source
12 . ./Source
13 echo $TuVariable
.
[rrc@Llawyr ~]$ history 10
125 6 vi Source
126 7 bash Source
127 8 echo $MiVariable
128 9 cat Source
129 10 echo $TuVariable
130 11 . /Source
131 12 . ./Source
132 13 echo $TuVariable
133 history -d 133
134 history 10
.
[rrc@Llawyr ~]$ !!
history 10
125 6 vi Source
126 7 bash Source
127 8 echo $MiVariable
128 9 cat Source
129 10 echo $TuVariable
130 11 . /Source
131 12 . ./Source
132 13 echo $TuVariable
133 history -d 133
134 history 10

[rrc@Llawyr ~]$ !-129
echo $TuVariable

Mira ^P <Enter>
[rrc@Llawyr ~]$ echo $TuVariable

Presiona ^p más de una ves

[rrc@Llawyr ~]$ !vi
vi Source

# vi ~/.bash_profile
HISTSIZE=450
HISTFILESIZE=450

export HISTCONTROL=ignorespace

[rrc@Llawyr ~]$ history
143 echo $TuVariable
144 cat HOLD
145 cat HOLD
146 history | less
147 clear
148 export HISTCONTROL=ignorespace
149 history

[rrc@Llawyr ~]$ ls -ald
drwxr-xr-x 56 rrc rrc 20480 Feb 14 15:42 ./

[rrc@Llawyr ~]$ history
143 echo $TuVariable
144 cat HOLD
145 cat HOLD
146 history | less
147 clear
148 export HISTCONTROL=ignorespace
149 history
150 history

[rrc@Llawyr ~]$ history -c
[rrc@Llawyr ~]$ history
1 history

</syntaxhighlight>

[[Category:Comandos de la terminal]]

Comandos de la terminal/history - Historial de revisiones

Rrc en 21:53 14 feb 2014