But in your case looking for /bin/java, you're not going to get /bin/java multiple times in a line so it's no big deal / problem, to use the. *?blah(lazy evaluation) which would match any character until the first blah. *(is greedy evaluation) can include a blah so if you have blah 5 times then it'd match blah 5 times. Note- the above is fine but i'd just note that if you're interested in regexes or technicalities. And you can add a -i to the grep e.g.or mixed with -o so -io to make it case insensitive(what -i does). detail about the process created by thi grep command. You can pipe the output to any command that accepts stream input. When you run the above command it will show you atleast one line of output i.e. This purpose is why the most popular use for pipes involves the commands grep and sort. You may match the number of lines or time for which its running and compare with zero or any other manipulation. echo user pid# 1 1 00:00 ? 00:04:00 /path/to/java/jdk_1.8/bin/java -foo=bar -foo2=bar2. ps aux grep -i abc will show the details of the process if its running. grep -oP "/.*/bin/java" Starts from the first forward slash then matches as much as possible any character up until and including /bin/java.Īnd if you had to work it out yourself from scratch, then besides knowing about regexes, you can test things quickly with echo e.g. Or this and doesn't need the -P with grep even. The capital P gets good regex support from grep From my understanding, ps lists the processes and pipes the list to grep. But you can enable it for otherĬommands as well by using _fzf_setup_completion helper function.How about grep -oP "/.*?/bin/java" That will go from the first forwardslash it finds then try to match up until the first occurrence of /bin/java. On bash, fuzzy completion is enabled only for a predefined set of commands Using grep with the ps aux command requires us. # - The first argument to the function ($1) is the base path to start traversal # - See the source code (completion. To list all the processes, we use the ps command with the BSD aux switch (notice there is no hyphen prefix). # Use ~~ as the trigger sequence instead of the default ** export FZF_COMPLETION_TRIGGER= '~~ ' # Options to fzf command export FZF_COMPLETION_OPTS= '-border -info=inline ' # Use fd () instead of the default find # command for listing path candidates. Known issues and limitations on Windows can be found on the wiki fzf is alsoĪvailable via Chocolatey, Scoop, and Winget: Package manager Pre-built binaries for Windows can be downloaded here. Refer to the package documentation for more information. grep has return value (0 or 1) and output. grep's return code is 0 when the output is 1-2 lines. ⚠️ Key bindings (CTRL-T / CTRL-R / ALT-C) and fuzzy auto-completion In case grep returns no lines (grep return code 1), I abort the script if I get 1 line I invoke A () or B () if more than 1 line. ~/.fzf/install Using Linux package managers Package Manager You can download fzf executable alone if you don't need the extra
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