DZone Snippets: shell code

find something with another execution command example

Sun, 17 Aug 2008 17:06:31 GMT

find . -type f -size +10000 -exec ls -al {} \;

WikiMedia change WikiSysOp password

Sun, 17 Aug 2008 16:57:56 GMT

command from shell
$ php WIKIMEDIA-DIR/admin/changePassword.php --user=WikiSysop --password=new-pass

Linux Shell script to rename files

Sun, 02 Mar 2008 16:13:16 GMT

Before rename command I was using following shell script to rename my mp3s



#!/bin/bash

# To remove blank space

if [ $# -eq 0 ];

then

 echo "Syntax: $(basename $0) file-name [command]"

 exit 1

fi

FILES=$1

CMD=$2

for i in $FILES

do

# remove all blanks and store them OUT

OUT=$(echo $i | sed 's/  *//g')

if [ "$CMD" == "" ];

then

#just show file

echo $OUT

else

#else execute command such as mv or cp or rm

[ "$i" != "$OUT" ] && $($CMD  "$i"  "$OUT")

fi

done

Block many users in a system v0.1.1

Sun, 02 Mar 2008 14:23:38 GMT

Block many users in a system using a text file as argument



#!/bin/bash



#******************************************************************************#

# BlockManyUsers.sh - Block many users in a system using a text file           #

#                       as argument                                            #

#   Copyright (C) 2008 - written by flynets - autisticiorg>   #

#   BlockManyUsers is free software: you can redistribute it and/or modify     #

#   it under the terms of the GNU General Public License as published by       #

#   the Free Software Foundation, either version 3 of the License, or          #

#   any later version.                                                         #

#                                                                              #

#   BlockManyUsers is distributed in the hope that it will be useful,          #

#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #

#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the               #

#   GNU General Public License for more details.                               #

#                                                                              #

#   You should have received a copy of the GNU General Public License          #

#   along with this program.  If not, see .      #

#******************************************************************************#



# Checks if you have the right privileges

if [ "$USER" = "root" ];then

   # Checks if there is an argument

   [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; }

   # checks if there a regular file

   [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; }

   TMPIN=$(mktemp)

   # Remove blank lines and delete duplicates

   sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN"

   

   NOW=$(date +"%Y-%m-%d-%X")

   LOGFILE="BMU-log-$NOW.log"



   for user in $(more "$TMPIN"); do

      # Checks if the user already exists.

      cut -d: -f1 /etc/passwd | grep "$user" > /dev/null

      OUT=$?

      if [ $OUT -eq 0 ];then

         # block selected user

         /usr/sbin/usermod -L "$user"

         # save user info in a file

         echo The user \"$user\" has been blocked. >> "$LOGFILE"

      else

        echo >&2 Error the user account \"$user\" doesnt exists! >> "$LOGFILE"

      fi

   done

   rm -f $TMPIN

   exit 0

else

   echo >&2 ERROR: You must be a root user to execute this script.

   exit 1

fi

exit 0

Add many users in a Debian system v0.2

Sun, 13 Jan 2008 17:25:42 GMT

Create many users in a Debian system using a text file as argument



#!/bin/bash



#******************************************************************************#

# AddManyUsers-deb.sh - Create many users in a Debian system using a text file #

# 			as argument					       #

#   Copyright (C) 2008 - written by flynets - autisticiorg>   # 

#   AddManyUsers-deb is free software: you can redistribute it and/or modify   #

#   it under the terms of the GNU General Public License as published by       #

#   the Free Software Foundation, either version 3 of the License, or          #

#   any later version.							       #

#									       #

#   AddManyUsers-deb is distributed in the hope that it will be useful,	       #

#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #

#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	       #

#   GNU General Public License for more details.			       #

#									       #

#   You should have received a copy of the GNU General Public License	       #

#   along with this program.  If not, see .      #

#******************************************************************************#



# Checks if you have the right privileges

if [ "$USER" = "root" ]

then



# CHANGE THIS PARAMETERS FOR A PARTICULAR USE

PERS_HOME="/home/"

PERS_SH="/bin/bash"



   # Checks if there is an argument

   [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; }

   # checks if there a regular file

   [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; }

   TMPIN=$(mktemp)

   # Remove blank lines and delete duplicates 

   sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN"

   

   NOW=$(date +"%Y-%m-%d-%X")

   LOGFILE="AMU-log-$NOW.log"

   

   for user in $(more "$TMPIN"); do

      # Checks if the user already exists.

      cut -d: -f1 /etc/passwd | grep "$user" > /dev/null

      OUT=$?

      if [ $OUT -eq 0 ];then

   	 echo >&2 "ERROR: User account: \"$user\" already exists."

	 echo >&2 "ERROR: User account: \"$user\" already exists." >> "$LOGFILE"

      else

	 # Create a new user

         /usr/sbin/useradd -d "$PERS_HOME""$user" -s "$PERS_SH" -m "$user"

	 # gpw must be installed on debian system

	 pass=$(gpw 1 8)

         echo $user:$pass | chpasswd

	 # save user and password in a file

	 echo -e $user"\t"$pass >> "$LOGFILE"

	 echo "The user \"$user\" has been created and has the password: $pass"

      fi

   done

   rm -f "$TMPIN"

   exit 0

else

   echo >&2 "ERROR: You must be a root user to execute this script."

   exit 1

fi

Add many users in a Red Hat system v0.2

Sun, 13 Jan 2008 17:21:34 GMT

Create many users in a RedHat system using a text file as argument



#!/bin/bash



#******************************************************************************#

# AddManyUsers-rh.sh - Create many users in a Red Hat system using a text file #

# 			as argument					       #

#   Copyright (C) 2008 - written by flynets - autisticiorg>   # 

#   AddManyUsers-rh is free software: you can redistribute it and/or modify    #

#   it under the terms of the GNU General Public License as published by       #

#   the Free Software Foundation, either version 3 of the License, or          #

#   any later version.							       #

#									       #

#   AddManyUsers-rh is distributed in the hope that it will be useful,	       #

#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #

#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	       #

#   GNU General Public License for more details.			       #

#									       #

#   You should have received a copy of the GNU General Public License	       #

#   along with this program.  If not, see .      #

#******************************************************************************#



# Checks if you have the right privileges

if [ "$USER" = "root" ]

then



# CHANGE THIS PARAMETERS FOR A PARTICULAR USE

PERS_HOME="/home/"

PERS_SH="/bin/bash"



   # Checks if there is an argument

   [ $# -eq 0 ] && { echo >&2 ERROR: You may enter as an argument a text file containing users, one per line. ; exit 1; }

   # checks if there a regular file

   [ -f "$1" ] || { echo >&2 ERROR: The input file does not exists. ; exit 1; }

   TMPIN=$(mktemp)

   # Remove blank lines and delete duplicates 

   sed '/^$/d' "$1"| sort -g | uniq > "$TMPIN"

   

   NOW=$(date +"%Y-%m-%d-%X")

   LOGFILE="AMU-log-$NOW.log"

   

   for user in $(more "$TMPIN"); do

      # Checks if the user already exists.

      cut -d: -f1 /etc/passwd | grep "$user" > /dev/null

      OUT=$?

      if [ $OUT -eq 0 ];then

   	 echo >&2 "ERROR: User account: \"$user\" already exists."

	 echo >&2 "ERROR: User account: \"$user\" already exists." >> "$LOGFILE"

      else

	 # Create a new user

         /usr/sbin/useradd -d "$PERS_HOME""$user" -s "$PERS_SH" -m "$user"

	 # passwdgen must be installed

	 pass=$(passwdgen -paq --length 8)

         echo $pass | passwd --stdin $user

	 # save user and password in a file

	 echo -e $user"\t"$pass >> "$LOGFILE"

	 echo "The user \"$user\" has been created and has the password: $pass"

      fi

   done

   rm -f "$TMPIN"

   exit 0

else

   echo >&2 "ERROR: You must be a root user to execute this script."

   exit 1

fi