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I run command to search for phrase in all files:

cat *.* | grep blabla

It works fine but I got problem with hidden files and directories. Command simply not deals with them. Ho to solve this problem?

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So you are looking for files something like file1.txt AND .bashrc ? – Serg Jan 21 at 15:10
If you want to also cat from hidden files you'll have to eliminate that first *. You could do something like cat *.* | grep blabla && cat .* | grep blabla. By the way, if you want to cat all the files in a directory you could simple use cat *. – Eduardo Cola Jan 21 at 15:15
For the record, it's also useless use of cat – Serg Jan 21 at 16:07
@dr01 yes , i did see that, hence +1ed – Serg Jan 21 at 17:01
WARNING: Most methods to include files starting with a dot in a command's argument list will also include the directory link ".." . Combine that with any recursive command, and the consequences can be ... intense. – rackandboneman Jan 21 at 21:22

By default, hidden files (i.e. those starting with a period) are excluded from the bash shell's glob expansion. However you can alter that using the dotglob setting e.g.

$ mkdir dir
$ touch dir/.hidden dir/visible

$ echo dir/*

$ shopt -s dotglob
$ echo dir/*
dir/.hidden dir/visible

You can unset the option afterwards with shopt -u dotglob

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Use find command with logical OR flag (-o ) and -exec . . .\+ flag

 find . -maxdepth 1 \( -iname "*.*" -o -iname ".*"   \) -exec grep "MySearchTerm" {} \+ 


  • find is a recursive command that searches files in specified directory. In this case , it is . the current working directory.
  • -maxdepth flag tells us to stay only in current directory. If you want to go recursivelly or specify how many subdirectories to descent, change 1 to number of levels you wanna go.
  • \( . . .\) part prevents shell of treating that as subshell, rather treating it as grouping of arguments to find.
  • -iname flags allow specifying for which filenames to search.
  • -o flag will tell find to search for files *.* or files that start with leading dot , the hidden files.
  • -exec . . .{} structure allows running specific command to operate on files found. \+ will tell find to take all the files as arguments for the command you want to run, in this case grep.

Here's a small example, where you can see SEARCHFILE.txt and .SEARCHFILE.txt are both found:

skolodya@ubuntu:$ find . -maxdepth 1 \( -iname "*.*" -o -iname ".*"   \) -exec grep "HelloWorld" {} \+ 2>/dev/null           
./SEARCHFILE.txt:HelloWorld ! I'm found
Binary file ./2015-05-05-raspbian-wheezy.img matches
./.SEARCHFILE.txt:HelloWorld ! I'm found
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"Hidden files" are simply files whose name starts with a dot. In GUIs applications these files are usually not shown, whence their name.

You can use shell globbing:

cat {*,.*} | grep blabla

The previous command include all files with no dot (*) and all files that start with a dot (.*).

By the way, this is an useless use of cat, and you should instead write your command as:

grep blabla {*,.*} 
share|improve this answer
Or, cat * .* | whatever – evilsoup Jan 21 at 21:22
It also includes . and .., which sometimes may have unwanted effects. And it generates warnings if there are only hidden files. – user23013 Jan 21 at 21:23
The brace expansion is not needed, you can do just cat * .* | grep blabla / grep 'blabla' * .*. – kos Jan 22 at 2:59

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