I need a really tricky find command the other day so I came up with the following.  I wanted to save the command some where as it really shows the power of find

Find all files that are not [...]]]> A thread dedicated to those useful Unix commands we all know and love.  Ya right.

I need a really tricky find command the other day so I came up with the following.  I wanted to save the command some where as it really shows the power of find

Find all files that are not in the images or languages directory that are older than seven days that end with .php or .doc and delete them also leave a log file of what was deleted.

find ./  \( -name images -o -name languages \) -prune -o \( -name ‘*.php’ -o -name ‘*.doc’ \) -mtime +7 -exec rm {} \; -print > /var/tmp/deleted_files

Sorry the command is all on one line.  Because the find statement is utilizing regular expressions and complex statements, ie “\(“, so you can’t use the “\” and take the statement to the next line.

To read the command better take it one step at a time.
Find all files or directories that have the name “images” OR the name “languages” and prune/remove those items found from the find results.   Using the -prune option is a great way to setup exclusions.  The next “-o” OR says if the files found are not named “images” or “languages” find the files that end in “.php” or “.doc” that are older than 7 days.  If anything is found that meets the conditions then remove those files and “print” the file name out to the log file.

This set of commands was to be used to change directory names inside a samba share, hense the directory names of \ and the unix escape needed making a bunch of [...]]]> I just helped a friend out with placing a shell variable into a sed command and thought it would be prudent to document it.

This set of commands was to be used to change directory names inside a samba share, hense the directory names of \ and the unix escape needed making a bunch of \\ appear.

server_name#  DIR=”blahblah”
server_name#  echo “bob” | sed “s/^/${DIR}\\\ADMIND__${DIR}\\\/”
blahblah\ADMIND__blahblah\bob

Set the variable DIR to “blahblah”, I should have just used “foo” it’s less to type.  Now echo the word “bob” but first add our variable and a prefix of “ADMIND__” to the front of bob.

I wanted to show another example, but don’t have time at the momment.

The important things to remember is to have the variables enclosed in double quotes.

Add the following to your .kshrc or .bashrc files.

# KSH terminal headers add to .profile PS1=`uname -n`” $ ” alias cd=_cd function _cd { \cd ${1+”$@”} && echo “\033]0;${USER}@${HOST}: ${PWD}\007\c” }

# BASH terminal headers add to .bashrc [...]]]> Please see another post of mine about terminal colors if this post is a little confusing.

Add the following to your .kshrc or .bashrc files.

# KSH terminal headers add to .profile
PS1=`uname -n`” $ ”
alias cd=_cd
function _cd {
\cd ${1+”$@”} && echo “\033]0;${USER}@${HOST}: ${PWD}\007\c”
}

# BASH terminal headers add to .bashrc
PROMPT_COMMAND=’echo -ne “\033]0;${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007″‘
# PS1=’\h] \w\$ ‘ #simple prompt with hostname and current path
PS1=’\[\033[01;32m\]\u@\h \[\033[01;34m\]\W \$ \[\033[00m\]‘ #color prompt

More detailed historic type information.

So you want the title bar to look different in you xterm or terminal window?

This also works for Putty terminal windows.

echo -n ^[]1\;$icon_name\^G^[]2\;$HOSTNAME\: $cwd\^G’

Two small changes will be necessary after this text is cut & pasted.
Replace the “^[" and "^G" characters with esc and CNTL-G by typing [ctrl-v][esc] and [ctrl-v][ctrl-g].

You can set up an alias

alias mytitle ‘icon_name; echo -n ^[]1\;$icon_name\^G^[]2\;$HOSTNAME\: $cwd\^G’

Then set an alias to change your prompt and title

alias cd ‘chdir \!*;set prompt=”`dirs`#\\!% “; mytitle’

Another way of stating this is:
Window and icon titles may be changed in a running xterm by using XTerm escape sequences. The following sequences are useful in this respect:

ESC]0;stringBEL — Set icon name and window title to string
ESC]1;stringBEL — Set icon name to string
ESC]2;stringBEL — Set window title to string
where ESC is the escape character (\033), and BEL is the bell character (\007).

echo -n “\033]0;${USER}@${HOST}\007″

should produce a title like username@hostname, assuming the shell variables $USER and $HOST are set correctly.

—-

I found the following also works very well.

Add these lines to your .profile for KSH or .bashrc for BASH and just uncomment the KSH or BASH line.

function _cd {
# KSH terminal headers
# \cd ${1+”$@”} && echo “\033]0;${USER}@${HOST}: ${PWD}\007\c”
# BASH terminal headers
# \cd ${1+”$@”} && echo -ne “\033]0;${USER}@${HOST}: ${PWD}\007″
}

alias cd=_cd

# Cool Colored prompt for BASH Shells it shows user@host and Present directory, but not the whole PATH.
# PS1=’\[\033[01;32m\]\u@\h \[\033[01;34m\]\W \$ \[\033[00m\]‘

I also like to add the following to my .bashrc so that I can use VI type commands
set -o vi

I liked this as it was simple, but had some nice elements that could be used elsewhere.

#!/bin/ksh # # Script to check for run away ftp processes. # 04/08 – Mike Byers

HOST=`uname -n` [...]]]> KSH script to check the number of processes on a system and send an email if there are too many.

I liked this as it was simple, but had some nice elements that could be used elsewhere.

#!/bin/ksh
#
# Script to check for run away ftp processes.
# 04/08 – Mike Byers

HOST=`uname -n`
ADMINZ=”admin@somewhere.com”
# Add email Recipients
RECPTS=”email_add@somewhere.com”

# Let the user pass an argument or default to ftp
if [ $1 ];
then
APP=”$1″
else
APP=”ftp”
fi

num=`ps -ea -o ‘user pid time pmem comm’ | grep $APP | wc -l`

if  [ $num -gt 6 ];
then
# Do stuff if there are too many active processes.

# echo “Number of processes is too many at $num ”
# Kill all active ftp processes
# pkill -9 -n $APP

# Send notification only
echo “Number of $APP processes is too many at $num on $HOST for user $LOGNAME” | /bin/mailx -r $ADMINZ -s “Too many processes on $HOST for user $LOGNAME” $ADMINZ $RECPTS

fi

Try the following.

perl -pi -e ‘s/find/replace/g’ *.txt

or to script it out. Find the TEXT in regular files and replace with NEWTEXT

for file in `find ./ -type f -exec grep -l TEXT {} \;` do perl -pi -e ‘s/TEXT/NEWTEXT/g’ $file done