Grep / ACK

Ack can be replacement for grep…..

# yum install ack

Suppose you are on /var/www/html, here you want to search text “svnlabs” in all files in current directory…. you can use:

# ack svnlabs
# man ack    (for more options)

grep : print lines matching a pattern.

find : search for files in a directory.

# grep -iR 'svnlabs' *.txt 
(It will search svnlabs in all text files in current directory)

Sources:
http://www.cyberciti.biz/faq/unix-linux-finding-files-by-content/
http://www.doyourself.org/index.php?page=5&ipp=10&category=linux
http://blog.amit-agarwal.co.in/2009/08/28/ack-on-solaris-grep-recursively/

midentify – It is the utility come with mplayer to find video ID of video files….

# /usr/bin/midentify video.mp4
ID_VIDEO_ID=0
ID_AUDIO_ID=1
ID_AID_1_LANG=eng
ID_FILENAME=video.mp4
ID_DEMUXER=lavfpref
ID_VIDEO_FORMAT=avc1
ID_VIDEO_BITRATE=0
ID_VIDEO_WIDTH=320
ID_VIDEO_HEIGHT=240
ID_VIDEO_FPS=25.000
ID_VIDEO_ASPECT=1.3333
ID_AUDIO_FORMAT=255
ID_AUDIO_BITRATE=0
ID_AUDIO_RATE=24000
ID_AUDIO_NCH=2
ID_LENGTH=72.62
ID_SEEKABLE=1
ID_CHAPTERS=0
ID_VIDEO_CODEC=ffh264
ID_AUDIO_BITRATE=128000
ID_AUDIO_RATE=48000
ID_AUDIO_NCH=2
ID_AUDIO_CODEC=faad
ID_EXIT=EOF

Try # mediainfo to get video infrmation on linux box