output the last NUM bytes; or use -c +NUM to output starting with byte NUM of each file

output appended data as the file grows;

an absent option argument means 'descriptor'

output the last NUM lines, instead of the last 10; or use -n +NUM to output starting with line NUM

with --follow=name, reopen a FILE which has not changed size after N (default 5) iterations to see if it has been unlinked or renamed (this is the usual case of rotated log files); with inotify, this option is rarely useful

with -f, terminate after process ID, PID dies

never output headers giving file names

keep trying to open a file if it is inaccessible

with -f, sleep for approximately N seconds (default 1.0) between iterations; with inotify and –pid=P, check process P at least once every N seconds

always output headers giving file names

line delimiter is NUL, not newline

output version information and exit