#! /bin/bash                                                                                            
homework 1 create------
#-

dir=/home/acs/homework/lesson_1/homework_0

for i in dir_a dir_b dir_c
do
>--- mkdir ${dir}/${i}
done

dir1=/home/acs/homework/lesson_1/homework_1

for i in a.txt b.txt c.txt
do
       cp ${dir1}/${i} ${dir1}/${i}.bak
done-

dir2=/home/acs/homework/lesson_1/homework_2
for i in a b c 
do-
    mv ${dir2}/$i.txt ${dir2}/${i}_new.txt
    echo mv ${dir2}/$i.txt ${dir2}/${i}_new.txt
done
dir3=/home/acs/homework/lesson_1/homework_3
for i in a.txt b.txt c.txt
do
>--- mkdir ${dir}/${i}
done

dir1=/home/acs/homework/lesson_1/homework_1

for i in a.txt b.txt c.txt
do                                                                                                                                                                                           
       cp ${dir1}/${i} ${dir1}/${i}.bak
done-

dir2=/home/acs/homework/lesson_1/homework_2
for i in a b c 
do-
    mv ${dir2}/$i.txt ${dir2}/${i}_new.txt
    echo mv ${dir2}/$i.txt ${dir2}/${i}_new.txt
done
dir3=/home/acs/homework/lesson_1/homework_3
for i in a.txt b.txt c.txt
do
    mv ${dir3}/dir_a/${i} ${dir3}/dir_b/

done

dir4=/home/acs/homework/lesson_1/homework_4
for i in a.txt b.txt c.txt
  do
    rm ${dir4}/${i}
done
dir5=/home/acs/homework/lesson_1/homework_5
for i in dir_a dir_b dir_c                                                                                                                                                                   
do-
    rm ${dir5}/${i} -r
done

dir6=/home/acs/homework/lesson_1/homework_6
mkdir ${dir6}/dir_a
mv ${dir6}/task.txt ${dir6}/dir_a/done.txt

dir7=/home/acs/homework/lesson_1/homework_7
for i in dir_0 dir_1 dir_2
do
    mkdir ${dir7}/${i}
done
for i in a b c
do

    for j in 0 1 2
    do
           cp  ${dir7}/${i}.txt ${dir7}/dir_${j}/${i}${j}.txt
    done
done

dir8=/home/acs/homework/lesson_1/homework_8
    rm ${dir8}/dir_a/a.txt
    mv ${dir8}/dir_b/b.txt ${dir8}/dir_b/b_new.txt

    cp ${dir8}/dir_c/c.txt ${dir8}/dir_c/c.txt.bak


dir9=/home/acs/homework/lesson_1/homework_9
    rm  ${dir9}/*.txt
  homework 1 test