I have a few handy scripts for searching through log files, especially monitoring SSH login attempts. I cannot just grep
through log files however, because the log files get “rolled”: compressed, and archived.
rob@kanga:/var/log $ ls -lh system.log* -rw-r-----@ 1 root admin 289K Mar 18 17:16 system.log -rw-r----- 1 root admin 79K Mar 18 00:00 system.log.0.gz -rw-r----- 1 root admin 39K Mar 17 00:02 system.log.1.gz -rw-r----- 1 root admin 36K Mar 16 00:02 system.log.2.gz -rw-r----- 1 root admin 35K Mar 15 00:02 system.log.3.gz -rw-r----- 1 root admin 25K Mar 14 00:01 system.log.4.gz -rw-r----- 1 root admin 69K Mar 13 00:01 system.log.5.gz -rw-r----- 1 root admin 68K Mar 12 00:01 system.log.6.gz rob@kanga:/var/log $
Suppose you want to grep
through your log files for SSH login activity, you can do it like this:
rob@kanga:/var/log $ { cat /private/var/log/system.log ; gunzip -c /private/var/log/system.*.gz ; } | grep sshd | wc -l 11364 rob@kanga:/var/log $
The magic happens in the curly braces, which concatenates the standard output of all enclosed commands. Be sure to include a semicolon after the last command, right before the closing curly brace.
An even shorter example:
rob@kanga:/var/log $ { echo hello ; echo world ; } | cat -n 1 hello 2 world rob@kanga:/var/log $
As mentioned, you will need to now press the power button. Some of the touchscreen is resistive type although
some from the touchscreen is capacitive sort. Following the upgrade,
turn the phone off, then back on.