NAME

       fish - the friendly interactive shell

SYNOPSIS

          fish [OPTIONS] [-c command] [FILE] [ARGUMENTS...]

DESCRIPTION

       fish is a command-line shell written mainly with interactive use in mind. This page briefly describes the
       options  for  invoking  fish.  The full manual is available in HTML by using the help command from inside
       fish, and in the fish-doc(1) man page. The tutorial  is  available  as  HTML  via  help  tutorial  or  in
       fish-tutorial(1).

       The following options are available:

       • -c  or  --command=COMMANDS  evaluate  the  specified  commands instead of reading from the commandline,
         passing any additional positional arguments via $argv.  Note  that,  unlike  other  shells,  the  first
         argument is not the name of the program ($0), but simply the first normal argument.

       • -C  or  --init-command=COMMANDS evaluate the specified commands after reading the configuration, before
         running the command specified by -c or reading interactive input

       • -d or --debug=DEBUG_CATEGORIES enable debug output and specify a pattern for matching debug categories.
         See Debugging below for details.

       • -o or --debug-output=DEBUG_FILE specify a file path to receive the debug output,  including  categories
         and fish_trace. The default is stderr.

       • -i or --interactive specify that fish is to run in interactive mode

       • -l or --login specify that fish is to run as a login shell

       • -n or --no-execute do not execute any commands, only perform syntax checking

       • -p or --profile=PROFILE_FILE when fish exits, output timing information on all executed commands to the
         specified file. This excludes time spent starting up and reading the configuration.

       • --profile-startup=PROFILE_FILE  will write timing information for fish's startup to the specified file.
         This is useful to profile your configuration.

       • -P or --private enables private mode, so fish will not access old or store new history.

       • --print-rusage-self when fish exits, output stats from getrusage

       • --print-debug-categories outputs the list of debug categories, and then exits.

       • -v or --version display version and exit

       • -f or --features=FEATURES enables one or more feature flags (separated by a comma). These are how  fish
         stages changes that might break scripts.

       The fish exit status is generally the exit status of the last foreground command.

DEBUGGING

       While  fish  provides  extensive  support  for  debugging  fish scripts, it is also possible to debug and
       instrument its internals. Debugging can be enabled by  passing  the  --debug  option.  For  example,  the
       following  command  turns  on  debugging  for  background  IO  thread  events, in addition to the default
       categories, i.e. debug, error, warning, and warning-path:

          > fish --debug=iothread

       Available  categories  are  listed  by  fish  --print-debug-categories.  The  --debug  option  accepts  a
       comma-separated  list  of  categories, and supports glob syntax. The following command turns on debugging
       for complete, history, history-file, and profile-history, as well as the default categories:

          > fish --debug='complete,*history*'

       Debug messages output to stderr by default. Note that  if  fish_trace  is  set,  execution  tracing  also
       outputs to stderr by default. You can output to a file using the --debug-output option:

          > fish --debug='complete,*history*' --debug-output=/tmp/fish.log --init-command='set fish_trace on'

       These  options  can  also be changed via the $FISH_DEBUG and $FISH_DEBUG_OUTPUT variables. The categories
       enabled via --debug are added to the ones enabled by $FISH_DEBUG, so they can be  disabled  by  prefixing
       them with - (reader-*,-ast* enables reader debugging and disables ast debugging).

       The file given in --debug-output takes precedence over the file in $FISH_DEBUG_OUTPUT.

COPYRIGHT

       2022, fish-shell developers

3.3                                               Feb 13, 2022                                           FISH(1)