Shell Programming and Scripting

#!/bin/ksh
cat /tmp/*.log.old >> /tmp/2016.log

rm /tmp/*.log.old > /dev/null 2>&1

ls /tmp/*.log > /tmp/system_logs

for i in `cat /tmp/system_logs`
do
  echo "New log file moving to old is $i \n"
  cp $i $i.old
  if [ $? -eq 0 ]
  then
     rm $i
  fi
done

year=$(date "+%Y")
for f in /tmp/*.log; do
  cat "$f" >> /tmp/${year}.log
  rm "$f"
done

$ ./test.sh
++ date +%Y
+ year=2016
+ for f in '/tmp/*.log'
+ cat /tmp/2016.log
cat: /tmp/2016.log: input file is output file
+ rm /tmp/2016.log
+ for f in '/tmp/*.log'
+ cat /tmp/aaa.log
+ rm /tmp/aaa.log
+ for f in '/tmp/*.log'
+ cat /tmp/bbb.log
+ rm /tmp/bbb.log
+ for f in '/tmp/*.log'
+ cat /tmp/ccc.log
+ rm /tmp/ccc.log

#!/bin/ksh
YEAR=$(date "+%Y")
cd /tmp
if [ ! -d "${YEAR}_LOGS" ]; then
  echo " ${YEAR}_LOGS doesn't exist. Creating dir..." > /dev/null 2>&1
  mkdir /tmp/${YEAR}_LOGS > /dev/null 2>&1
else
  echo " ${YEAR}_LOGS directory exists" > /dev/null 2>&1
fi

for i in $(ls /tmp/ |grep old | awk -F "." '/aaa|bbb|cccc|dddd/ {print $1}'); do
  cat /tmp/${i}.log.old >> /tmp/${YEAR}_LOGS/${i}_${YEAR}.log
  rm /tmp/${i}.log.old > /dev/null 2>&1
done

for i in /tmp/*.log; do
  echo "Log being moved to old is $i ... \n"
  cp $i $i.old
  if [ $? -eq 0 ]; then
     rm $i
  fi
done

#!/bin/ksh
YEAR=$(date "+%Y")
cd /tmp

mkdir -p "${YEAR}_LOGS"

for i in aaa bbb cccc dddd
do
  if [ -f "$i.log.old" ]
  then
    cat "$i.log.old" >> "${YEAR}_LOGS/${i}_$YEAR.log" && rm -f "$i.log.old"
  fi
done

for i in *.log
do
  printf 'Log being moved to old is %s ... \n\n' "$PWD/$i"
  mv "$i" "$i.old"
done