.TH "history" 1 "Tue Feb 19 2019" "Version 3.0.2" "fish" \" -*- nroff -*-
.ad l
.nh
.SH NAME
\fBhistory\fP - Show and manipulate command history
.PP
.SS "Synopsis"
.PP
.nf

\fBhistory\fP search [ --show-time ] [ --case-sensitive ] [ --exact | --prefix | --contains ] [ --max=n ] [ --null ] [ -R | --reverse ] [ 'search string'\&.\&.\&. ]
\fBhistory\fP delete [ --show-time ] [ --case-sensitive ] [ --exact | --prefix | --contains ] 'search string'\&.\&.\&.
\fBhistory\fP merge
\fBhistory\fP save
\fBhistory\fP clear
\fBhistory\fP ( -h | --help )
.fi
.PP
.SS "Description"
\fChistory\fP is used to search, delete, and otherwise manipulate the history of interactive commands\&.
.PP
The following operations (sub-commands) are available:
.PP
.IP "\(bu" 2
\fCsearch\fP returns history items matching the search string\&. If no search string is provided it returns all history items\&. This is the default operation if no other operation is specified\&. You only have to explicitly say \fChistory search\fP if you wish to search for one of the subcommands\&. The \fC--contains\fP search option will be used if you don't specify a different search option\&. Entries are ordered newest to oldest unless you use the \fC--reverse\fP flag\&. If stdout is attached to a tty the output will be piped through your pager by the history function\&. The history builtin simply writes the results to stdout\&.
.IP "\(bu" 2
\fCdelete\fP deletes history items\&. Without the \fC--prefix\fP or \fC--contains\fP options, the exact match of the specified text will be deleted\&. If you don't specify \fC--exact\fP a prompt will be displayed before any items are deleted asking you which entries are to be deleted\&. You can enter the word 'all' to delete all matching entries\&. You can enter a single ID (the number in square brackets) to delete just that single entry\&. You can enter more than one ID separated by a space to delete multiple entries\&. Just press [enter] to not delete anything\&. Note that the interactive delete behavior is a feature of the history function\&. The history builtin only supports \fC--exact --case-sensitive\fP deletion\&.
.IP "\(bu" 2
\fCmerge\fP immediately incorporates history changes from other sessions\&. Ordinarily \fCfish\fP ignores history changes from sessions started after the current one\&. This command applies those changes immediately\&.
.IP "\(bu" 2
\fCsave\fP immediately writes all changes to the history file\&. The shell automatically saves the history file; this option is provided for internal use and should not normally need to be used by the user\&.
.IP "\(bu" 2
\fCclear\fP clears the history file\&. A prompt is displayed before the history is erased asking you to confirm you really want to clear all history unless \fCbuiltin history\fP is used\&.
.PP
.PP
The following options are available:
.PP
These flags can appear before or immediately after one of the sub-commands listed above\&.
.PP
.IP "\(bu" 2
\fC-C\fP or \fC--case-sensitive\fP does a case-sensitive search\&. The default is case-insensitive\&. Note that prior to fish 2\&.4\&.0 the default was case-sensitive\&.
.IP "\(bu" 2
\fC-c\fP or \fC--contains\fP searches or deletes items in the history that contain the specified text string\&. This is the default for the \fC--search\fP flag\&. This is not currently supported by the \fCdelete\fP subcommand\&.
.IP "\(bu" 2
\fC-e\fP or \fC--exact\fP searches or deletes items in the history that exactly match the specified text string\&. This is the default for the \fCdelete\fP subcommand\&. Note that the match is case-insensitive by default\&. If you really want an exact match, including letter case, you must use the \fC-C\fP or \fC--case-sensitive\fP flag\&.
.IP "\(bu" 2
\fC-p\fP or \fC--prefix\fP searches or deletes items in the history that begin with the specified text string\&. This is not currently supported by the \fC--delete\fP flag\&.
.IP "\(bu" 2
\fC-t\fP or \fC--show-time\fP prepends each history entry with the date and time the entry was recorded\&. By default it uses the strftime format \fC# cn\fP\&. You can specify another format; e\&.g\&., \fC--show-time='%Y-%m-%d %H:%M:%S '\fP or \fC--show-time='%a%I%p'\fP\&. The short option, \fC-t\fP, doesn't accept a strftime format string; it only uses the default format\&. Any strftime format is allowed, including \fCs\fP to get the raw UNIX seconds since the epoch\&.
.IP "\(bu" 2
\fC-z\fP or \fC--null\fP causes history entries written by the search operations to be terminated by a NUL character rather than a newline\&. This allows the output to be processed by \fCread -z\fP to correctly handle multiline history entries\&.
.IP "\(bu" 2
\fC-<number>\fP \fC-n <number>\fP or \fC--max=<number>\fP limits the matched history items to the first 'n' matching entries\&. This is only valid for \fChistory search\fP\&.
.IP "\(bu" 2
\fC-R\fP or \fC--reverse\fP causes the history search results to be ordered oldest to newest\&. Which is the order used by most shells\&. The default is newest to oldest\&.
.IP "\(bu" 2
\fC-h\fP or \fC--help\fP display help for this command\&.
.PP
.SS "Example"
.PP
.nf

\fBhistory\fP clear
  Deletes all history items
.fi
.PP
.PP
.PP
.nf
\fBhistory\fP search --contains 'foo'
  Outputs a list of all previous commands containing the string 'foo'\&.
.fi
.PP
.PP
.PP
.nf
\fBhistory\fP delete --prefix 'foo'
  Interactively deletes commands which start with 'foo' from the history\&.
  You can select more than one entry by entering their IDs separated by a space\&.
.fi
.PP
.SS "Customizing the name of the history file"
By default interactive commands are logged to \fC$XDG_DATA_HOME/fish/fish_history\fP (typically \fC~/\&.local/share/fish/fish_history\fP)\&.
.PP
You can set the \fCfish_history\fP variable to another name for the current shell session\&. The default value (when the variable is unset) is \fCfish\fP which corresponds to \fC$XDG_DATA_HOME/fish/fish_history\fP\&. If you set it to e\&.g\&. \fCfun\fP, the history would be written to \fC$XDG_DATA_HOME/fish/fun_history\fP\&. An empty string means history will not be stored at all\&. This is similar to the private session features in web browsers\&.
.PP
You can change \fCfish_history\fP at any time (by using \fCset -x fish_history 'session_name'\fP) and it will take effect right away\&. If you set it to \fC'default'\fP, it will use the default session name (which is \fC'fish'\fP)\&.
.PP
Other shells such as bash and zsh use a variable named \fCHISTFILE\fP for a similar purpose\&. Fish uses a different name to avoid conflicts and signal that the behavior is different (session name instead of a file path)\&. Also, if you set the var to anything other than \fCfish\fP or \fCdefault\fP it will inhibit importing the bash history\&. That's because the most common use case for this feature is to avoid leaking private or sensitive history when giving a presentation\&.
.SS "Notes"
If you specify both \fC--prefix\fP and \fC--contains\fP the last flag seen is used\&.
.PP
Note that for backwards compatibility each subcommand can also be specified as a long option\&. For example, rather than \fChistory search\fP you can type \fChistory --search\fP\&. Those long options are deprecated and will be removed in a future release\&. 
