1. mydir = `pwd` | mydir = $(pwd)
2. [ -f myfile ] | test -f myfile
3. n1 -eq n2 | n1 = n2
4. n1 -ne n2 | n1 != n2
5. for var in 1 .. 10 do var++ done | for (( var = 1; var < 10; a++))
1. mydir = `pwd` | mydir = $(pwd)
2. [ -f myfile ] | test -f myfile
3. n1 -eq n2 | n1 = n2
4. n1 -ne n2 | n1 != n2
5. for var in 1 .. 10 do var++ done | for (( var = 1; var < 10; a++))