명령을 여러 번 수행. 더 많은 정보: https://www.gnu.org/software/bash/manual/bash.html#Looping-Constructs.
for {{변수}} in {{item1 item2 ...}}; do {{echo "Loop is executed"}}; done
for {{변수}} in {{{from}}..{{to}}..{{step}}}; do {{echo "Loop is executed"}}; done
for {{변수}} in {{경로/대상/파일1 경로/대상/파일2 ...}}; do {{echo "Loop is executed"}}; done
for {{변수}} in {{경로/대상/디렉터리1/ 경로/대상/디렉터리2/ ...}}; do {{echo "Loop is executed"}}; done
for {{변수}} in */; do (cd "${{변수}}" || continue; {{echo "Loop is executed"}}) done