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Full Discussion: find the most recent file containing a certain string
Top Forums Shell Programming and Scripting find the most recent file containing a certain string Post 302354384 by plelie2 on Friday 18th of September 2009 03:45:11 AM
Old 09-18-2009
1) the files are all in the same directory and their are no subdirs
2) the frequency and the number of files changes from 60 per year to 20 per week depending on some external factors
3) this are all normal unix text files

---------- Post updated at 09:38 AM ---------- Previous update was at 08:59 AM ----------

the solution of anchal_khare does not work, it's well possiblze thatt here are no files containing this string, in this case the solution gives the last file in the dir anyway, and it should give nothing

---------- Post updated at 09:45 AM ---------- Previous update was at 09:38 AM ----------

I think I found a simple solution
In the first try I wanted to find all the files with the string and sort them later on, I just reversed this approach. I sort all the files first and search the string afterwards

Code:
ls -1rt *.trc | xargs grep -l " NORESETLOGS" | tail -1

 

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LEARN ABOUT CENTOS

unsquashfs

UNSQUASHFS(1)						  uncompress squashfs filesystems					     UNSQUASHFS(1)

NAME

       mksquashfs - tool to uncompress squashfs filesystems

SYNOPSIS

       unsquashfs [OPTIONS] FILESYSTEM [directories or files to extract]

DESCRIPTION

       Squashfs  is  a	highly compressed read-only filesystem for Linux. It uses zlib compression to compress both files, inodes and directories.
       Inodes in the system are very small and all blocks are packed to minimize data overhead. Block sizes greater than 4K are supported up to  a
       maximum of 64K.

       Squashfs  is  intended for general read-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in con-
       strained block device/memory systems (e.g. embedded systems) where low overhead is needed.

OPTIONS

       -v, -version
	   print version, licence and copyright information.

       -d PATHNAME, -dest PATHNAME
	   unsquash to PATHNAME, default "squashfs-root".

       -n, -no-progress
	   don't display the progress bar.

       -no, -no-xattrs
	   don't extract xattrs in file system.

       -x, -xattrs
	   extract xattrs in file system (default).

       -p NUMBER, -processors NUMBER
	   use NUMBER processors. By default will use number of processors available.

       -i, -info
	   print files as they are unsquashed.

       -li, -linfo
	   print files as they are unsquashed with file attributes (like ls -l output).

       -l, -ls
	   list filesystem, but don't unsquash.

       -ll, -lls
	   list filesystem with file attributes (like ls -l output), but don't unsquash.

       -f, -force
	   if file already exists then overwrite.

       -s, -stat
	   display filesystem superblock information.

       -e EXTRACT_FILE, -ef EXTRACT_FILE
	   list of directories or files to extract. One per line.

       -da SIZE, -data-queue SIZE
	   Set data queue to SIZE Mbytes. Default 256 Mbytes.

       -fr SIZE, -frag-queue SIZE
	   Set fragment queue to SIZE Mbytes. Default 256 Mbytes.

       -r, -regex
	   treat extract names as POSIX regular expressions rather than use the default shell wildcard expansion (globbing).

   Decompressors available
       gzip

       lzo

       xz

SEE ALSO

       mksquashfs(1)

HOMEPAGE

       More information about unsquashfs and the squashfs filesystem can be found at <http://squashfs.sourceforge.net/>.

AUTHOR

       squashfs was written by Phillip Lougher <plougher@users.sourceforge.net>.

       This manual page was written by Daniel Baumann <daniel.baumann@progress-technologies.net>.

4.2								    2012-06-30							     UNSQUASHFS(1)
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