1285252823
Since the GNU `diff` utility uses grep-style regular expressions[0], which use the BRE style, we need to tweak the regex to make it work properly (most notably - in BRE the meta characters need to be escaped). ``` $ diff a b 21c21 < Volume Key: 256bit --- > Volume Key: 257bit 25c25 < Disk Ceiling: 323.2M --- > Disk Ceiling: 323.1M $ diff -I '^\s*Disk (Size|Free|Floor|Ceiling):' a b 21c21 < Volume Key: 256bit --- > Volume Key: 257bit 25c25 < Disk Ceiling: 323.2M --- > Disk Ceiling: 323.1M $ diff -I '^\s*Disk \(Size\|Free\|Floor\|Ceiling\):' a b && echo OK 21c21 < Volume Key: 256bit --- > Volume Key: 257bit ``` Caught in one of the nightly CentOS CI cron jobs. [0] https://www.gnu.org/software/diffutils/manual/html_node/Specified-Lines.html
System and Service Manager
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