Shulou(Shulou.com)06/03 Report--

variable values

echo $USERecho $? echo $PS1echo $PATH

Configuration file modifications:

[root@node4~]#cp /etc/DIR_COLORS ~/dir_colors vim ~/dir_colors 88 DIR 01;33 # directory[root@centos6 ~]#vim ~/.bashrc alias rm='rm -i'alias cp='cp -i'alias mv='mv -i'alias grep='grep --color=auto'# Source global definitionsif [ -f /etc/bashrc ]; then . /etc/bashrcfialias cdnet='cd /etc/sysconfig/network-scripts/' [root@centos6 ~]#. .bashrc[root@node4~]#cat ~/.vimrcset nuset culset ai set pasteset icset ai centos6 firewall: service iptables stop chconfig iptables off centos7: firewall: systemctl stop firewall systemctl disable firewall

Log cleanup section:

[root@centos6 /proc/10]#find / -mount -type f -size +100M |xargs -i du -sh {}|sort -nr3.8G /root/centos6.9.iso

Script section:

df |grep ^/dev/sd |sed -r "s/.* [ ]+([0-9]{1,3})%.*/\ 1/"df -i |grep ^/dev/sd |sed -r "s/.* [ ]+([0-9]{1,3})%.*/\ 1/"[root@node4~]#ifconfig eth0 |head -n2 |tail -n1 |tr -s " " |cut -d " " -f3192.168.137.47[root@centos6 ~]#ifconfig eth0 |head -n2 |tail -n1 |cut -d ":" -f2 |cut -d " " -f1192.168.137.6[root@centos6 /app]#df |tr -s " " "%" |cut -d % -f 5 [root@node4/var/log/httpd]#cut -d " " -f1 access_log |sort |uniq -c|sort -nr 4 192.168.137.1 2 192.168.0.118[root@node4/var/log/httpd]#awk '{a[$1]++}END{for (i in a ){print i,a[i]}}'< /var/log/httpd/access_log[root@node4/app]#seq 1 10 |sort -R |head -n1 random access 3[root@node4/app]#cut -d: -f1,3 /etc/passwd| sort -t: -k2 -nroot:0bin:1daemon:2adm:3lp:4[root@node4/app]#cat /var/log/httpd/access_log |cut -d " " -f1 |sort |uniq -c |sort -nr 7 192.168.137.1 2 192.168.0.118 [root@centos6 /app]#awk 'BEGIN{x=1.5;y=1024;z=85/100;printf "%0.2f\n",x*y*z}' 1305.60[root@node4~]#df |grep /dev/sd |grep -o "[0-9]\+%" |grep -o "[0-9]\+" |sort -nr |head -n129[root@node4~]#egrep -v "^#|^$" /etc/fstab[root@node4~]#grep -v -e "^#" -e "^$" /etc/fstab[root@node4~]#grep -v -e"^[[:space:]]*$" -e "^#" /etc/fstab [root@node4~]#cat /etc/passwd |grep "^\(.*\):.*/\ 1$"sync:x:5:0:sync:/sbin:/bin/syncshutdown:x:6:0:shutdown:/sbin:/sbin/shutdownhalt:x:7:0:halt:/sbin:/sbin/halt[root@node4~]#cat /etc/passwd |egrep "^(.*):.*/\ 1$" axy[root@node4~]#echo axy |egrep "(a|b)xy"axy[root@node4~]#cat /etc/redhat-release|grep -o " [0-9]\+. " |grep -o "[0-9]\+" 7[root@node4~]#cat /etc/centos-release |grep -o "[0-9]\+" |head -n17 grouping: \(\) Bundles one or more characters together and treats them as a whole, e.g.\(root\)\+ grouping The matched contents of the pattern in parentheses are recorded by the regular expression engine in internal variables named: \1, \2, \3,... \1 indicates the character matched by the pattern between the first left parenthesis from the left and the matching right parenthesis

Modify the password part;

Password part: [root@centos6 /app]#openssl rand -base64 100| tr -dc "[:alnum:]"| head -c124oa9aPP1tr9I[root@centos6 /app]#cut -d : -f 1,3 /etc/passwd [root@centos6 /app]#df |tr -s " " "%" |cut -d % -f 5

Variable:

[root@centos6 /app]# echo $[$RANDOM%80+1]30

[root@node4~]#egrep -w "^(root|sun)" /etc/passwd|cut -d: -f1,7

root:/bin/bash

sun:/bin/bash

IP address:

[root@node4~]#egrep -w "^(root|sun)" /etc/passwd|cut -d: -f1,7

root:/bin/bash

sun:/bin/bash

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