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优秀运维脚本鉴赏
#! /bin/bash# Function: 根据用户输入的PID，过滤出该PID所有的信息read -p "请输入要查询的PID: " Pn=`ps -aux| awk '$2~/^'$P'$/{print $11}'|wc -l`if [ $n -eq 0 ];then echo "该PID不存在！！" exitfiecho "--------------------------------"echo "进程PID: $P"echo "进程命令：`ps -aux| awk '$2~/^'$P'$/{print $11}'`"echo "进程所属用户: `ps -aux| awk '$2~/^'$P'$/{print $1}'`"echo "CPU占用率：`ps -aux| awk '$2~/^'$P'$/{print $3}'`%"echo "内存占用率：`ps -aux| awk '$2~/^'$P'$/{print $4}'`%"echo "进程开始运行的时刻：`ps -aux| awk '$2~/^'$P'$/{print $9}'`"echo "进程运行的时间：`ps -aux| awk '$2~/^'$P'$/{print $10}'`"echo "进程状态：`ps -aux| awk '$2~/^'$P'$/{print $8}'`"echo "进程虚拟内存：`ps -aux| awk '$2~/^'$P'$/{print $5}'`"echo "进程共享内存：`ps -aux| awk '$2~/^'$P'$/{print $6}'`"echo "--------------------------------"二、根据进程名过滤进程信息
会显示出该进程名包含的所有线程#! /bin/bash# Function: 根据输入的程序的名字过滤出所对应的PID，并显示出详细信息，如果有几个PID，则全部显示read -p "请输入要查询的进程名：" NAMEN=`ps -aux | grep $NAME | grep -v grep | wc -l` ##统计进程总数if [ $N -le 0 ];then echo "该进程名没有运行！"fii=1while [ $N -gt 0 ]do echo "进程PID: `ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $2}'`" echo "进程命令：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $11}'`" echo "进程所属用户: `ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $1}'`" echo "CPU占用率：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $3}'`%" echo "内存占用率：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $4}'`%" echo "进程开始运行的时刻：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $9}'`" echo "进程运行的时间：` ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $11}'`" echo "进程状态：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $8}'`" echo "进程虚拟内存：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $5}'`" echo "进程共享内存：`ps -aux | grep $NAME | grep -v grep | awk 'NR=='$i'{print $0}'| awk '{print $6}'`" echo "***************************************************************" let N-- i++done#! /bin/bash# Function：根据用户名查询该用户的所有信息read -p "请输入要查询的用户名：" Aecho "------------------------------"n=`cat /etc/passwd | awk -F: '$1~/^'$A'$/{print}' | wc -l`if [ $n -eq 0 ];thenecho "该用户不存在"echo "------------------------------"else echo "该用户的用户名：$A" echo "该用户的UID：`cat /etc/passwd | awk -F: '$1~/^'$A'$/{print}'|awk -F: '{print $3}'`" echo "该用户的组为：`id $A | awk {'print $3'}`" echo "该用户的GID为：`cat /etc/passwd | awk -F: '$1~/^'$A'$/{print}'|awk -F: '{print $4}'`" echo "该用户的家目录为：`cat /etc/passwd | awk -F: '$1~/^'$A'$/{print}'|awk -F: '{print $6}'`" Login=`cat /etc/passwd | awk -F: '$1~/^'$A'$/{print}'|awk -F: '{print $7}'` if [ $Login == "/bin/bash" ];then echo "该用户有登录系统的权限！！" echo "------------------------------" elif [ $Login == "/sbin/nologin" ];then echo "该用户没有登录系统的权限！！" echo "------------------------------" fifi#! /bin/bash# Function:对账户的密码的一些加固read -p "设置密码最多可多少天不修改：" Aread -p "设置密码修改之间最小的天数：" Bread -p "设置密码最短的长度：" Cread -p "设置密码失效前多少天通知用户：" Dsed -i '/^PASS_MAX_DAYS/c\PASS_MAX_DAYS '$A'' /etc/login.defssed -i '/^PASS_MIN_DAYS/c\PASS_MIN_DAYS '$B'' /etc/login.defssed -i '/^PASS_MIN_LEN/c\PASS_MIN_LEN '$C'' /etc/login.defssed -i '/^PASS_WARN_AGE/c\PASS_WARN_AGE '$D'' /etc/login.defs
echo "已对密码进行加固，新用户不得和旧密码相同，且新密码必须同时包含数字、小写字母，大写字母！！"sed -i '/pam_pwquality.so/c\password requisite pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type= difok=1 minlen=8 ucredit=-1 lcredit=-1 dcredit=-1' /etc/pam.d/system-auth
echo "已对密码进行加固，如果输入错误密码超过3次，则锁定账户！！"n=`cat /etc/pam.d/sshd | grep "auth required pam_tally2.so "|wc -l`if [ $n -eq 0 ];thensed -i '/%PAM-1.0/a\auth required pam_tally2.so deny=3 unlock_time=150 even_deny_root root_unlock_time300' /etc/pam.d/sshdfi
echo "已设置禁止root用户远程登录！！"sed -i '/PermitRootLogin/c\PermitRootLogin no' /etc/ssh/sshd_config
read -p "设置历史命令保存条数：" Eread -p "设置账户自动注销时间：" Fsed -i '/^HISTSIZE/c\HISTSIZE='$E'' /etc/profilesed -i '/^HISTSIZE/a\TMOUT='$F'' /etc/profile
echo "已设置只允许wheel组的用户可以使用su命令切换到root用户！"sed -i '/pam_wheel.so use_uid/c\auth required pam_wheel.so use_uid ' /etc/pam.d/sun=`cat /etc/login.defs | grep SU_WHEEL_ONLY | wc -l`if [ $n -eq 0 ];thenecho SU_WHEEL_ONLY yes >> /etc/login.defsfi
echo "即将对系统中的账户进行检查...."echo "系统中有登录权限的用户有："awk -F: '($7=="/bin/bash"){print $1}' /etc/passwdecho "********************************************"echo "系统中UID=0的用户有："awk -F: '($3=="0"){print $1}' /etc/passwdecho "********************************************"N=`awk -F: '($2==""){print $1}' /etc/shadow|wc -l`echo "系统中空密码用户有：$N"if [ $N -eq 0 ];then echo "恭喜你，系统中无空密码用户！！" echo "********************************************"else i=1 while [ $N -gt 0 ] do None=`awk -F: '($2==""){print $1}' /etc/shadow|awk 'NR=='$i'{print}'` echo "------------------------" echo $None echo "必须为空用户设置密码！！" passwd $None let N-- done M=`awk -F: '($2==""){print $1}' /etc/shadow|wc -l` if [ $M -eq 0 ];then echo "恭喜，系统中已经没有空密码用户了！" elseecho "系统中还存在空密码用户：$M" fifi
echo "即将对系统中重要文件进行锁定，锁定后将无法添加删除用户和组"read -p "警告：此脚本运行后将无法添加删除用户和组！！确定输入Y，取消输入N；Y/N：" icase $i in [Y,y]) chattr +i /etc/passwd chattr +i /etc/shadow chattr +i /etc/group chattr +i /etc/gshadow echo "锁定成功！";; [N,n]) chattr -i /etc/passwd chattr -i /etc/shadow chattr -i /etc/group chattr -i /etc/gshadow echo "取消锁定成功！！";; *) echo "请输入Y/y or N/n"esac