Shell代码片段收集

# Return the size of the drive in MB
get_drive_size () {
  ldrive=$1

  # Make sure you can print disk info using parted
  parted --script /dev/$ldrive print >/dev/null 2>&1

  # If unable to read disk, it's likely it needs a disklabel
  if [  "$?" != "0" ]; then
    echo "Creating a new disklabel on $ldrive" >> $INSTALL_LOG
    echo "parted /dev/$ldrive mklabel msdos" >> $INSTALL_LOG
    output=$(parted -s /dev/$ldrive mklabel msdos)

    # Get the drive size from parted
    lsize=$(parted -s /dev/$ldrive p | grep "^Disk" | awk '{ print $3 }')

    if [ $(echo $lsize | grep error) ]; then
      echo "Unable to read disk label.  Exiting."
      exit 1
    fi
  fi

  # Get the drive size from parted
  lsize=$(parted -s /dev/$ldrive p | grep "^Disk" | awk '{ print $3 }')
  # Get the reported units (mB, GB, kB)
  lmodifier=$(echo $lsize | sed 's/[0-9\.]//g')
  # remove the modifier
  lsize=$(echo $lsize | sed 's/[a-z,A-Z]//g')
  # Remove any fractions
  lsize=$(echo $lsize | cut -f1 -d'.')
  # Translate our size into mB if not there already
  if [ $lmodifier = "GB" ]; then 
    lsize=$(($lsize * 1000))
  elif [ $lmodifier = "kB" ]; then 
    lsize=$(($lsize / 1000))
  fi

  echo $lsize
}

disk_size=`fdisk -l $CF | grep MB | cut -d”:” -f2 | cut -d “,” -f1| sed s/MB//g `

upper_str()
{
        upper=`echo $1 | tr "[a-z]" "[A-Z]"`
        echo $upper
}

echo $TOS_VERSION | grep "^3.3.016" 
if [  $? != 0  ]
then 
        VERSION_016="false"
else
        VERSION_016="true"
fi

auto_echo "Are you sure to begin[y/n]:"
while read answer
do
answer=`upper_str $answer`
if [ "$answer" = "Y" ] 
then
break
elif [ "$answer" = "N" ] 
then
write_free
exit
fi
auto_echo "Are you sure to begin[y/n]:"
done

for x in /var/log/*
do
    echo `basename $x` is a file living in /var/log
done

myvar=0
while [ $myvar -ne 10 ]
do
    echo $myvar
    myvar=$(( $myvar + 1 ))
done


myvar=0
until [ $myvar -eq 10 ]
do
    echo $myvar
    myvar=$(( $myvar + 1 ))
done

*$x为文件名，只获取文件的后缀，至于是为什么现在不明白? *

case "${x##*.}" in
     gz)
           gzunpack ${SROOT}/${x}
           ;;
     bz2)
           bz2unpack ${SROOT}/${x}
           ;;
     *)
           echo "Archive format not recognized."
           exit
           ;;
esac

#! /bin/bash  
while read LINE
do
        echo $LINE 
done < /etc/passwd

while read line; 
        do cp aaaa $line;
done << (awk '{for(i=1; i <= NF; ++i){if($i ~/^-l/){gsub("^-l","lib",$i); printf("%s.so\n", $i)}}}' libso.txt  | sort -u)