In the scripts subdirectory under your home directory there is a file named tstparse.sh. You want to set an Extended ACL so the jsmith user has all permissions to just this file. Which command will accomplish this?

A. setacl -a user:jsmith:rwx ~/scripts/tstparse.sh B. extacl -a user=jsmith:rwx ~/scripts/tstparse.sh C. modacl user=jsmith:rwx ~/scripts/tstparse.sh D. setfacl -m u:jsmith:rwx ~/scripts/tstparse.sh

Answer: d

setfacl 全名是 “set file access control lists”

修改檔案的 ACL 權限，可以使用 setfacl 搭配 -m 或 --modify 參數，並指定 ACL 權限。例如授予 myuser 使用者讀取與執行（rx）權限：

# 授予 myuser 使用者 rx 權限
setfacl -m u:myuser:rx myfile.txt

:::spoiler 詳細語法 :::

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