Examine these commands executed by root:
# mkdir -p /jail /jail/bin /jail/lib64
# cp $(which bash) /jail/bin/
# ldd $(which bash)
linux-vdso.so.1 (0x00007ffd574f5000)
libtinfo.so.6 => /lib64/libtinfo.so.6 (0x00007fb458c2c000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fb458a28000)
libc.so.6 => /lib64/libc.so.6 (0x00007fb458666000)
/lib64/ld-linux-x86-64.so.2 (0x00007fb459177000)
# cp /lib64/libtinfo.so.6 /jail/lib64/
# cp /lib64/libdl.so.2 /jail/lib64/
# cp /lib64/libc.so.6 /jail/lib64/
# cp /lib64/ld-linux-x86-64.so.2 /jail/lib64/
# chroot /jail
What is the output from the cd, pwd, and ls commands?
Examine this segment of /etc/rsyslog.conf:
# Log all kernel messages to the console.
# Logging much else clutters up the screen.
#kern.* /dev/console
# Log anything (except mail) of level info or higher.
# Don’t log private authentication messages!
*.info;mail.none;authpriv.none;cron.none /var/log/messages
# The authpriv file has restricted access.
authpriv.* /var/log/secure
# Log all the mail messages in one place.
mail.* -/var/log/maillog
# Log cron stuff
cron.* /var/log/cron
# Everybody gets emergency messages
*.emerg :omusrmsg:*
Now examine this log output:
less
Nov 9 20:32:16 server02 sudo[4570]: pam_unix(sudo:session): session opened for user opc (uid=0)
Nov 9 20:32:17 server02 sudo[4570]: pam_unix(sudo:session): session closed
Nov 9 20:32:24 server02 unix_chkpwd[4661]: password check failed for user
Nov 9 20:32:24 server02 su[4581]: pam_unix(su:auth): authentication failed; logname= uid=1000 euid=0 tty=pts/0 ruser=opc rhost= user=root
Which setting enabled the reporting of this log file output?
Examine this output:
Last metadata expiration check: 4:30:21 ago on Mon 26 Oct 2020 03:09:52 PM GMT
Installed Packages
Name : gzip
Version : 1.9
Release : 9.el8
Architecture : x86_64
Size : 412 k
Source : gzip-1.9-9.el8.src.rpm
Repository : @System
From repo : anaconda
Summary : The GNU data compression program
URL : http://www.gzip.org/
License : GPLv3+ and GFDL
Description : The gzip package contains the popular GNU gzip data compression
program. Gzipped files have a .gz extension.
Gzip should be installed on your system, because it is a very
commonly used data compression program.
Which command generated it?
TESTED 23 Dec 2024
