1.编写脚本/root/bin/backup.sh，可实现每日将/etc/目录备份到/root/etcYYYY-mm-dd中
- 编写脚本
[root@centos6 bin]vim backup.sh
#!/bin/bash
echo -e "\e[1;31mStart backup...\e[0m"
sleep 2
cp -av /etc /root/etc`date +%F` &> /dev/null
echo -e "\e[1;31mBackup is finished\e[0m"
- 测试结果
[root@centos6 bin]backup.sh
Start backup...
Backup is finished
[root@centos6 bin]ll -hd /root/etc2019-02-13/
drwxr-xr-x. 125 root root 12K Feb 13 04:44 /root/etc2019-02-13/
[root@centos6 bin]ll -hd /etc
drwxr-xr-x. 125 root root 12K Feb 13 04:44 /etc
2.编写脚本/root/bin/disk.sh,显示当前硬盘分区中空间利用率最大的值
- 编写脚本
[root@centos6 bin]vim disk.sh
#!/bin/bash
df | grep -E "^/dev/s[hd][a-z]" | grep -oE ' [0-9]+'% | grep -oE '[0-9]+' | sort -nr | head -1
- 测试结果
[root@centos6 bin]disk.sh
12
[root@centos6 bin]df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 48G 5.1G 41G 12% /
tmpfs 491M 80K 491M 1% /dev/shm
/dev/sda1 976M 35M 891M 4% /boot
/dev/sda3 29G 44M 28G 1% /data
/dev/sr1 3.7G 3.7G 0 100% /media/CentOS_6.9_Final_
/dev/sr0 2.1G 2.1G 0 100% /media/CentOS_6.9_Final
3.编写脚本/root/bin/nologin.sh和login.sh,实现禁止和允许普通用户登录系统
- 编写脚本
[root@centos6 bin]vim nologin.sh
[ ! -e '/etc/nologin' ] && touch /etc/nologin && echo "DenyAccountLogon"
[root@centos6 bin]vim login.sh
#!/bin/bash
[ -e '/etc/nologin' ] && `rm -rf /etc/nologin` && echo "Allow login account"
2.测试结果
[root@centos6 bin]nologin.sh
DenyAccountLogon
[root@centos6 bin]ls /etc | grep nologin
nologin
[root@centos6 ~]ssh xm11211@192.168.48.128
xm11211@192.168.48.128's password:
Connection closed by 192.168.48.128
[root@centos6 bin]login.sh
Allow login account
[root@centos6 bin]ls /etc | grep nologin
[root@centos6 bin]!ssh
ssh xm11211@192.168.48.128
xm11211@192.168.48.128's password:
[xm11211@centos6 ~]
4.查找/var目录下不属于root、lp、gdm的所有文件
[root@centos6 ~]find /var -not \( -user root -o -user lp -o -user gdm -o -type d \) -ls
394626 4 -rw-r--r-- 1 xm11211 xm11211 32 Dec 28 14:35 /var/cache/gdm/xm11211/dmrc
264307 4 -rw------- 1 rpc rpc 852 Jan 27 13:32 /var/cache/rpcbind/rpcbind.xdr
264308 4 -rw------- 1 rpc rpc 164 Jan 27 13:32 /var/cache/rpcbind/portmap.xdr
264350 4 -rw------- 1 postfix postfix 33 Feb 15 10:43 /var/lib/postfix/master.lock
264544 4 -rw-r--r-- 1 ntp ntp 8 Feb 11 18:42 /var/lib/ntp/drift
...
5.统计/etc/init.d/functions文件中每个单词的出现次数，并排序（用grep和sed两种方法分别实现）
[root@centos6 ~]grep -Eow '[[:alpha:]]+' /etc/init.d/functions | sort | uniq -c | sort -n
61 return
65 echo
72 fi
77 then
83 if
...
[root@centos6 ~]sed -r 's/[^[:alpha:]]+/\n/g' /etc/init.d/functions | sort | uniq -c | sort -n
61 return
72 fi
73 echo
75 pid
77 then
83 if
...
6.利用sed 取出ifconfig命令中本机的IPv4地址
[root@centos7 ~]ifconfig | sed -r '2!d;s/.*inet (.*) netmask.*/\1/'
192.168.48.129
[root@centos6 ~]ifconfig | sed -r '2!d;s/.*r:(.*) B.*/\1/'
192.168.48.128
7.在CentOS7上编译安装apache 2.4源码包,并启动此服务（最简化版，待完善）
1.关闭firewalld并设置开机禁止启动
[root@centos7 bin]systemctl stop firewalld
[root@centos7 bin]systemctl disable firewalld
2.关闭SElinux
[root@centos7 bin]setenforce 0
[root@centos7 bin]vim /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
3.安装开发包组
[root@centos7 bin]yum groupinstall "development tools"
4.编译安装httpd
[root@centos7 ~]tar -xf httpd-2.4.38.tar.gz
[root@centos7 ~]cd httpd-2.4.38/
[root@centos7 httpd-2.4.38]./configure --help
`configure' configures this package to adapt to many kinds of systems.
Usage: ./configure [OPTION]... [VAR=VALUE]...
To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE. See below for descriptions of some of the useful variables.
Defaults for the options are specified in brackets.
Configuration:
-h, --help display this help and exit
--help=short display options specific to this package
--help=recursive display the short help of all the included packages
-V, --version display version information and exit
-q, --quiet, --silent do not print `checking ...' messages
--cache-file=FILE cache test results in FILE [disabled]
-C, --config-cache alias for `--cache-file=config.cache'
-n, --no-create do not create output files
--srcdir=DIR find the sources in DIR [configure dir or `..']
[root@centos7 httpd-2.4.38]./configure --prefix=/app --sysconfdir=/etc/httpd22
[root@centos7 httpd-2.4.38]make -j 4 && make install
5.输出二进制程序
[root@centos7 httpd-2.4.38]vim /etc/profile.d/env.sh
PATH=/app/bin:$PATH
[root@centos7 httpd-2.4.38]. /etc/profile.d/env.sh
6.启动httpd
[root@centos7 httpd-2.4.38]apachectl start
