brian's bash & script review

###convert "ANOTHER_SHIT" to "SOMETHINGANOTHER_SHITSOMETHING" if there is "SHIT"
/SHIT/s/ANOTHER_SHIT/SOMETHING&SOMETHING/g FOO.txt
###
#!bin/bash
read  FUCKERS
[ -e "$FUCKERS" ]
echo $?
ls -ld $FUCKERS
###
USER@56105 ~ $ [ 5 -ge 5 ] ; echo $?
0
USER@56105 ~ $ [ 5 -gt 5 ] ; echo $?
1
USER@56105 ~ $ [ 5 -le 5 ] ; echo $?
0
USER@56105 ~ $ X=5 ; [ $X -le 5 ] ; echo $?
0
USER@56105 ~ $ X=5 ; [ 5 -le $X ] ; echo $?
0
###
A=21 ; if [ $A -gt 20 ] ; then echo "FUK U BECKY" ; fi
###
root@6310:~# cat /etc/profile|egrep ^.{14}$
# /etc/profile
pathmunge () {
            ;;
            fi

###-a -o #and/ or
USER@56105 ~ $ A=5;[ $A -gt 3 -a $A -lt 11 ] ;echo $?
0
###
A=3 ; [ $A -gt 2 -a $A -lt 5 ] ; echo $?
A=a ; [ ! \( -f "$A" -o -d "$A' \) ] ; echo $?
ans=x ; [ "$ans" = 'Y' -o "$ans" = 'Y' ];echo $?
A=a ; [ ! \( -f "$A" -o -d "$A" \) ] ; echo $? #THIS ONE IS PRETTY FUCKED UP
A=3 ; [ \( $A -gt 2 \) -a \( $A  -lt 5 \) ] ; echo $?
[ ! -f "$A" -o -d "$A" ] ; echo $?
###
USER@56105 ~ $ A=3 ;if [ $A -gt 2 ]; then /T/BAE.sh ; else /T/SCP.DHT.txt.FROM.HOME.sh ; fi
LL



###convert some shit to following shit #MIND THE &
s/SOMETHING/SOMETHING&SOMETHING/g
########
56105 ~ # read dis
fuck\ u
56105 ~ # echo $dis
fuck u
56105 ~ #
###
set -o #list
set -o notify #enable
set +o notify #disable
###
shopt -p #list
shopt -s #enable
shopt -u #disable
###
a@56105 ~ $ PATH=$PATH:/home/a/ # PATH=/home/a/:$PATH
a@56105 ~ $ echo $PATH
/home/a/bin:/home/a/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/home/a/
a@56105 ~ $ export PATH=/home/a/bin:/home/a/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
a@56105 ~ $ echo $PATH
/home/a/bin:/home/a/.local/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games