android - Logcat doesn't show logs for past time using Terminal Emulator -


i have android device kit-kat (not rooted) , active developer's mode , usb debugging.

when connect device (i.e @ 10am) via usb desktop , run command like:

"adb shell logcat -v time > log.txt"

it save logs past time too, mean able see happened device during night. first line of file consist of 

"--------- beginning of /dev/log/system"

i want past time logs events/crashes/etc remotely. when run kind of terminal emulator remotely (by remote ui control) , run same shell command not see past or previous events/issues, current , first line of file consist of

"--------- beginning of /dev/log/main"

how make remote logging work?


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