Brief Analysis of Linuxchattr commands

Linuxchattr command analysis chattr is changefileattribute meaning www.2cto.com parameter +: add Attribute-: minus attribute: set a bunch of attributes: Anoatimeupdate cannot be modified atimeCnocopyonwriteDsync...
In the analysis of the Linux chattr command, chattr is the meaning of change file attribute. the parameter www.2cto.com +: add attribute-: subtract attribute =: set a bunch of attributes: A no atime update does not allow modification of atime C no copy on write D synchoronous directory updates S synchronous updates must be synchronized T top of directory hierarchy a append only allows automatic compression of append c compressed, automatically decompress the package during reading. wow! High level! D no dump when dump is enabled, files with the d attribute cannot be added to dump e extent format I immuttbale, so that a file cannot be deleted, changed its name, and added soft and hard links, when j data journalling ext3 cannot be written, the Log journal s secure deletion can be safely deleted. t no tail-merging u undeletable is opposite to s. when data is deleted, it will still exist in the disk.