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이 sed 명령은 무엇을 합니까?

tag-icon • tag-icon sed
이 sed 명령은 무엇을 합니까? 
sed -i "s/\bforceencrypt=/encryptable=/g;s/\bforcefdeorfbe=/encryptable=/g;s/\b,encryptable=footer//" "$fstab"

한동안 Android에서 암호화를 비활성화하기 위해 이 명령을 해독하려고 노력했지만 알 수 없습니다.

답변1

정보 sed에서 :

's/REGEXP/REPLACEMENT/[FLAGS]'
     (substitute) Match the regular-expression against the content of
     the pattern space.  If found, replace matched string with
     REPLACEMENT.

 The 's' command can be followed by zero or more of the following
FLAGS:

'g'
     Apply the replacement to _all_ matches to the REGEXP, not just the
     first.

'NUMBER'
     Only replace the NUMBERth match of the REGEXP.
...................................................................

Command Line Options: 
'-i[SUFFIX]'
'--in-place[=SUFFIX]'
     This option specifies that files are to be edited in-place.  GNU
     'sed' does this by creating a temporary file and sending output to
     this file rather than to the standard output.(1).

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