81 ls 82 cd 83 ls 84 exit 85 pwd 86 clear 87 ls 88 cd cse391 89 ls 90 wget https://courses.cs.washington.edu/courses/cse391/24au/lectures/1/lecture1.zip 91 ls 92 unzip lecture1.zip 93 ls 94 cd lecture1 95 ls 96 ls -l 97 ls dir1 98 cd dir1 99 ls 100 man ls 101 ls 102 ls -a 103 ls . 104 pwd 105 cd .. 106 pwd 107 cd ../.. 108 pwd 109 cd cse391/lecture1 110 ls 111 pwd 112 cd 113 pwd 114 cd cse391/lecture1 115 ls 116 pwd 117 ls dir1 118 ls -a dir1 119 ls -ah dir1 120 ls -ahl dir1 121 ls -hal dir1 122 ls -lah dir1 123 ls -l -a -h dir1 124 ls -lah dir1 125 ls dir1 dir2 126 ls 127 vim some_file.txt