shell 腳本之基礎篇作業

1、編寫腳本/root/bin/systeminfo.sh,顯示當前主機系統信息，包括主機名，IPv4地址，操作系統版 ? 本，內核版本，CPU型號，內存大小，硬盤大小。

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:?顯示當前主機系統信息，包括主機名，IPv4地址，操作系統版本，內核版本，CPU型號，內存大小，硬盤大小
echo?"The?hosname?is:?$(hostname)"
echo?"The?kernel?version?is:?$(uname?-r)"
echo?"The?server_ip?is:?$(?ifconfig?|grep?‘inet\b‘?|grep?-v?‘127.0.0.1‘?|sed?‘s/.*addr:\b//‘?|sed?‘s/Bcast.*//‘)"
echo?"The?CPU?is:?$(lscpu?|grep?-i?‘model?name‘?|tr?-s?‘?‘?|sed?‘s/.*://‘)"
echo?"The?OS?version?is:?$(cat?/etc/redhat-release)"
echo?"The?memorysize?is:?$(free?|sed?-n?‘2p‘?|tr?:?‘?‘?|tr?-s?‘?‘?|cut?-d‘?‘?-f2)"
echo?"The?disksize?is:?$(fdisk?-l?|sed?-n?‘2p‘)"
[root@localhost?bin]#?bash?-n?systeminfometion.sh?
[root@localhost?bin]#?bash?systeminfometion.sh?
The?hosname?is:?localhost.localdomain
The?kernel?version?is:?2.6.32-642.el6.x86_64
The?server_ip?is:?10.1.253.35??
The?CPU?is:??Intel(R)?Core(TM)?i3-2350M?CPU?@?2.30GHz
The?OS?version?is:?CentOS?release?6.8?(Final)
The?memorysize?is:?1004108
The?disksize?is:?Disk?/dev/sda:?128.8?GB,?128849018880?bytes
[root@localhost?bin]#?bash?-n?systeminfometion.sh?
[root@localhost?bin]#?vim?systeminfometion.sh
You?have?new?mail?in?/var/spool/mail/root

2、編寫腳本/root/bin/backup.sh，可實現每日將/etc/目錄備份到/root/etcYYYY-mm-dd中

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:???實現每日將/etc/目錄備份到/root/etcYYYY-mm-dd中

backdir="/root/etc$(date?+%F)"
echo?$backdir
cp?-a?/etc/.?$backdir?&&?echo?"backup?finished"
unset?backdir
[root@localhost?~]#?ll
drwxr-xr-x.?75?root?root?4096?Aug?12?05:11?etc2016-08-11

3、編寫腳本/root/bin/disk.sh,顯示當前硬盤分區中空間利用率最大的值

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:??顯示當前硬盤分區中空間利用率最大的值

disk_max=$(df?|tr?-s?‘?‘?%?|cut?-d%?-f5?|grep?‘[0-9]‘?|sort?-nr?|head?-1)
echo?"The?diskused_max?is?$disk_max"
unset?disk_max

[root@localhost?bin]#?bash?disk.sh?
The?diskused_max?is?53

4、編寫腳本/root/bin/links.sh,顯示正連接本主機的每個遠程主機的IPv4地址和連接數，并按連接數 ? 從大到小排序

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:??顯示正連接本主機的每個遠程主機的IPv4地址和連接數，并按連接數???從大到小排序

netstat?-nt?|tr?-s?‘?‘?|cut?-d‘?‘?-f5?|grep?‘[0-9]‘?|sed?‘s/:.*//‘?|sort?|uniq?-c?|sort
[root@localhost?bin]#?bash?link.sh
?1?10.10.10.1
?1?10.1.250.69
?3?10.1.50.10

5、寫一個腳本/root/bin/sumid.sh，計算/etc/passwd文件中的第10個用戶和第20用戶的ID之和

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:??計算/etc/passwd文件中的第10個用戶和第20用戶的ID之和
user10_id=$(sed?-n?‘10p‘?/etc/passwd?|cut?-d:?-f3)
user20_id=$(sed?-n?‘20p‘?/etc/passwd?|cut?-d:?-f3)
sumid=$[$user10_id+$user20_id]
echo?"The?sum_id?is:?$sumid"
unset?user10_id
unset?user20_id
unset?sumid

6、寫一個腳本/root/bin/sumspace.sh，傳遞兩個文件路徑作為參數給腳本，計算這兩個文件中所有空 ? 白行之和

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:??傳遞兩個文件路徑作為參數給腳本，計算這兩個文件中所有空白行之和

file1=$(grep?‘^$‘?$1?|wc?-l)
file2=$(grep?‘^$‘?$2?|wc?-l)
sumspace=$[$file1+$file2]
echo?"The?total?spacelines?is?$sumspace"
unset?file1
unset?file2
[root@localhost?bin]#?bash?sumspace.sh??/etc/fstab?/etc/profile
The?total?spacelines?is?12

6、寫一個腳本/root/bin/sumfile.sh,統計/etc, /var, /usr目錄中共有多少個一級子目錄和文件

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:???統計/etc,?/var,?/usr目錄中共有多少個一級子目錄和文件

etc_sum=$(ls?-A?/etc?|wc?-l)
var_sum=$(ls?-A?/var?|wc?-l)
usr_sum=$(ls?-A?/usr?|wc?-l)
sumfile=$[$etc_sum+$var_sum+$usr_sum]
echo?"The?total?file?is?$sumfile"
unset?etc_sum
unset?var_sum
unset?usr_sum
[root@localhost?bin]#?bash?sumfile.sh?
The?total?file?is?208

7、寫一個腳本/root/bin/argsnum.sh，接受一個文件路徑作為參數；如果參數個數小于1，則提示用 ? ? 戶“至少應該給一個參數”，并立即退出；如果參數個數不小于1，則顯示第一個參數所指向的文件 ? 中的空白行數

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:???接受一個文件路徑作為參數；如果參數個數小于1，則提示用戶“至少應該給一個參數”，并立即退出；如果參數個數不小于1，則顯示第一個參數所指向的文件中的空白行數

[?$#?-lt?1?]?&&?echo?"please?give?a?argument"?||?grep?‘^$‘?$1?|wc?-l
[root@localhost?bin]#?bash?argsnum.sh?/etc/fstab
1

8、寫一個腳本/root/bin/hostping.sh，接受一個主機的IPv4地址做為參數，測試是否可連通。如果能 ? ping通，則提示用戶“該IP地址可訪問”；如果不可ping通，則提示用戶“該IP地址不可訪問”

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:??接受一個主機的IPv4地址做為參數，測試是否可連通。如果能ping通，則提示用戶“該IP地址可訪問”；如果不可ping通，則提示用戶“該IP地址不可訪問”

[?$#?-ge?1?]?&&?echo?"$1"?|egrep?-o?‘(\<([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.\<(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){2}\<([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))‘?&>?/dev/null?&&?(ping?-c?3?$1?&>/dev/null?&&?echo?-e?"\e[31m?this?ip?is?accessed\e[0m"?||?echo?-e?"\e[31m?this?ip?is?not?accessed?\e[0m")
[root@localhost?bin]#?bash?hostping.sh?10.1.1.1
this?ip?is?not?accessed?
[root@localhost?bin]#?bash?hostping.sh?10.1.253.35
this?ip?is?accessed

9、chmod -rw /tmp/file1，編寫腳本/root/bin/per.sh,判斷當前用戶對/tmp/fiile1文件是否不可讀且 ? 不可寫

[root@localhost?tmp]#?chmod?-rw?file1
[root@localhost?tmp]#?ll?file1
----------.?1?user1?user1?0?Aug?12?08:10?file1

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:????判斷當前用戶對/tmp/fiile1文件是否不可讀且不可寫

[?-r?/tmp/file1?-a?-w?/tmp/file1?]?&&?echo?"Yous?can?not?to?read?and?writ?file1"
[root@localhost?bin]#?bash?per.sh?
Yous?can?not?to?read?and?writ?file1

10、編寫腳本/root/bin/nologin.sh和login.sh,實現禁止和充許普通用戶登錄系統。

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:???實現禁止和充許普通用戶登錄系統

[?-f?/etc/nologin?]?&&?(rm?-f?/etc/nologin;echo?user?enable?login)?||?echo?user?disable?login?already
[root@localhost?bin]#?bash?login.sh?
user?disable?login?already

11、寫一個腳本/root/bin/hostping.sh，接受一個主機的IPv4地址做為參數，先判斷是否合格IP，否， ? 提示IP格式不合法并退出，是，測試是否可連通。如果能ping通，則提示用戶“該IP地址可訪問”； ? 如果不可ping通，則提示用戶“該IP地址不可訪問”

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:?接受一個主機的IPv4地址做為參數，先判斷是否合格IP，否，提示IP格式不合法并退出，是，測試是否可連通。如果能ping通，則提示用戶“該IP地址可訪問”；???如果不可ping通，則提示用戶“該IP地址不可訪問
#!/bin/bash
[?$#?-ge?1?]?&&?echo?"$1"?|egrep?-o?‘(\<([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.\<(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){2}\<([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))‘?&>?/dev/null?&&?(ping?-c?3?$1?&>/dev/null?&&?echo?-e?"\e[31m?this?ip?is?accessed\e[0m"?||?echo?-e?"\e[31m?this?ip?is?not?accessed?\e[0m")
[root@localhost?bin]#?bash?hostping.sh?10.1.1.1
?this?ip?is?not?accessed?
[root@localhost?bin]#?bash?hostping.sh?10.1.253.35
?this?ip?is?accessed

12、計算1+2+3+…+100的值

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:???計算1+2+3+...+100的值

echo?{1..10}?|tr?‘?‘?+?|bc
[root@localhost?bin]#?bash?sum1.sh?
5050

i=1
sum=0
for?i?in?{1..100};do
????sum=$[$sum+$i]
????i=$i+1
done
echo?"the?sum?is?$sum"
unset?i
unset?sum
[root@localhost?bin]#?bash?sum.sh?
the?sum?is?5050

13、計算從腳本第一參數A開始，到第二個參數B的所有數字的總和，判斷B是否大于A，否提示錯誤并退出，是則計算之

#!/bin/bash
#?author:huiping
#?version:1.0.1
#?date:2016-08-11
#?describe:??計算從腳本第一參數A開始，到第二個參數B的所有數字的總和，判斷B是否大于A，否提示錯誤并退出，是則計算之

#!/bin/bash
[[?$1?-lt?$2?]]?&&?(echo?$(seq?$1?$2)?|tr?‘?‘?+?|bc)?||?echo?"error,please?input?effective?number"
[root@localhost?bin]#?bash?f1.sh?10?30
420
[root@localhost?bin]#?bash?f1.sh?100?30
error,please?input?effective?number

轉載自?http://www.mamicode.com/info-detail-1484727.html