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I have a directory in which lots of files (around 200) with the name temp_log.$$ are created with several other important files which I need to check.

How can I easily list out all the files and exclude the temp_log.$$ files from getting displayed?

Expected output

$ ls -lrt <exclude-filename-part>
-- Lists files not matching the above given string

I have gone through ls man page but couldn't find anything in this reference. Please let me know if I have missed any vital information here.

Thanks

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in BASH, ls --hide='temp_log.$$' should work. You could/should also extend this with wildcards, depending which part of the whole term temp_log.$$ is. –  erch Jul 23 '13 at 17:21

5 Answers 5

up vote 6 down vote accepted

With GNU ls (the version on non-embedded Linux and Cygwin, sometimes also found elsewhere), you can exclude some files when listing a directory.

ls -I 'temp_log.*' -lrt

With zsh, you can let the shell do the filtering. Pass -d to ls so as to avoid listing the contents of matched directories.

setopt extended_glob          # put this in your .zshrc
ls -dltr ^temp_log.*

With ksh, bash or zsh, you can use the ksh filtering syntax. In zsh, run setopt ksh_glob first. In bash, run shopt -s extglob first.

ls -dltr !(temp_log.*)
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You can use grep with the option -v.

ls -lrt | grep -v <exclude-filename-part>
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not sure why this was downvoted, it's the correct answer. –  Tim Kennedy Oct 16 '12 at 12:21
4  
Doing a grep on ls output is not always correct and is not recommended. It has side effects. Not able to recall exact issues. Side note - down vote was not from me ;) –  mtk Oct 16 '12 at 12:28
    
Here's the link as to why parsing ls is a bad idea. –  mtk Oct 18 '12 at 13:28

You can use find for this:

find . \! -name 'temp_log*'

This will just print the names, you can add -ls to make a ls -l style output with timestamp and permissions, or use -exec ls {} + to actually pass to ls with whatever options you want for columns, sorting, etc.

I wrote this assuming this was just files in a directory. If the directory contains other directories, you may want to avoid recursively listing them

find . \! -name 'temp_log*' -maxdepth 1

And if you use ls you'll want to pass the -d option to stop it from listing inside the directories: -exec ls -d {} +

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Probably want -maxdepth 1 as well to mimic non-recursive ls. –  jw013 Oct 16 '12 at 13:27

I think you want to use a feature of the shell, not of ls. I use bash, so I checked for what you want in man bash.. Search for "^EXPANSION", (by first pressing '/'). Excerpt:-

EXPANSION

   Expansion is performed on the command line after it has been split into words.  There are seven  kinds  of  expansion
   performed:  brace  expansion,  tilde  expansion,  parameter  and variable expansion, command substitution, arithmetic
   expansion, word splitting, and pathname expansion.

... < snip > ...
Pathname Expansion

   After word splitting, unless the -f option has been set, bash scans each word for the characters *, ?, and [.  If one
   of these characters appears, then the word is regarded as a pattern, and replaced with an alphabetically sorted  list
   of  file  names  matching  the  pattern.

I've recently started excluding files based on their first letter, with a command like:

> ls ./[^t]*

This would match anything that doesn't start with the letter t. If you add more characters between the brackets, then you exclude files starting with those letters too.

Looking for a link, and I've a good one! See Pattern Matching. From there, this would work for your case:-

> ls -lrt ./!(temp_log.*)

simples :)

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Just do

ls -ltr `grep -il patterntosearch  *`
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grep searches for a pattern within a file, rather than in the file name. –  evilsoup Jul 23 '13 at 16:53

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