tries to open a file even if it is inaccessible when tail starts or if it becomes inaccessible later; useful only with -f.
outputs the last N bytes.
is equivalent to -f.
is equivalent to -n.
performs open/fstat of a file specified by name (if there have been N consecutive iterations for which the size has remained the same) to determine if that file name is still associated with the same device/inode-number pair as before.
if a file has been specified by name, controls how long tail follows the descriptor of a file that continues growing at a rapid pace even after it is deleted or renamed. After detecting N consecutive size changes for a file, open/fstat the file to determine if that file name is still associated with the same device/inode-number pair as before.
terminates after process ID PID dies (only may be specified if -f is).
does not outputs headers giving file names.
sleeps S seconds between iterations (only may be specified if -f is).
outputs headers giving file names.
supports b, k and m as suffixes (referring to multipliers 512, 1024 and 1048576, respectively), as opposed to the c or l suffixes as stated in the SUS.