A chronological documentation test project, nothing serious, really!
ISO images are files containing the data of a CD (almost bit per bit). They can be mounted, using the loopback device. ISO images can only be mounted read-only (use mkisofs to create images). Kernel Requirements To mount ISO images you need the following in your kernel(as module or builtin): loop-back filesystem support (under Device […]
date >> ssh-intruders.log ; cat /var/log/secure | grep -i “sshd.*authentication failure” | sort | awk ‘{FS=”rhost=”; print $2}’ | awk ‘{FS=”user=”; print $1}’ | grep “.*\..*\.” | grep -v “knownhost.com” | grep -v “knownhost2.com” | sort | uniq | while read i; do counter=`grep -i “$i” /var/log/secure | wc -l` ; echo “$counter attempts by […]
find / -name ‘*html’ -print \ | xargs grep -l ‘www.example.com’ \ | less -Opages
Different ways of replacing text etc. Replace every occurrence of pattern1 (pat1) with pat2 :g/pat1/s//pat2/g Replace every occurence of pattern1 (pat1) with a newline :g/pat1/s//\r/g In practice this inserts a newline after every occurence of pat1.