init

get_groups.sh

+#!/bin/bash
+
+if [ $# -ne 1 ];then
+    echo "usage: ./get_groups username"
+    exit 1
+fi
+
+USER=$1
+GID=$(cat /etc/passwd | grep -E ^$1: | cut -d ":" -f 3)
+if [ "$GID" = "" ]; then 
+    echo "user not found"
+    exit 1
+else 
+    MAIN_GROUP=$(cat /etc/group | grep $GID | cut -d ":" -f 1)
+    SEC_GROUPS=$(cat /etc/group | grep $1 | cut -d ":" -f 1 | sed s/"$MAIN_GROUP"//)
+    RES=$(echo $MAIN_GROUP $SEC_GROUPS )
+    echo $RES
+    
+
+
+fi
\ No newline at end of file

largest_file.sh

+#!/bin/bash
+
+if [ $# -ne 1 ];then
+    echo "usage: ./largest_file folder"
+    exit 1
+fi
+
+FILES=$(ls -R $1)
+
+if [ $? -eq 1 ]; then
+    echo "folder not existing"
+    exit 1
+fi
+
+if [ "$FILES" = " " ]; then
+    echo "folder empty"
+    exit 1
+fi