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【多选题】
下列概述正确的选项是（ ）
A.
grep -i ‘saturday|sunday’ ABC 命令可以实现确定在文件 ABC 中是否含有表示星期六或者星期日字符的行
B.
a*xbj 是能与正则表达式 a.x[i-j]*b[i-j] 匹配的字符串
C.
gzip fs* 命令可以一次性批量压缩所有以 fs 开头的每个文件
D.
A[0-9]* 是与字符串 A1234 不匹配的正则表达式
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