2017 the latest enterprise Shell face test and enterprise operation and maintenance of a total of 30 cases

1, enterprise Shell face question 1: Batch generate random character file name case

Use the For loop to bulk create 10 HTML files in the/oldboy directory, where each file needs to contain 10 random lowercase characters plus a fixed string oldboy, with the following name examples:

[Email protected] c19]# ls/oldboyapquvdpqbk_oldboy.html  mpyogpsmwj_oldboy.html  txynzwofgg_ oldboy.htmlbmqiwhfpgv_oldboy.html  mtrzobsprf_oldboy.html  vjxmlflawa_oldboy.htmljhjdcjnjxc_oldboy.html  qeztkkmewn_oldboy.htmljpvirsnjld_oldboy.html  ruscyxwxai_oldboy.html

Answer:

#!/bin/! -d/oldboy] && mkdir/oldboy-p for in {. Ten }do  pass1-'  /oldboy/${pass}_ Oldboy.htmldone

2, enterprise Shell face question 2: Batch renaming special cases

Change the Oldboy string in the result file name in the above interview title to Oldgirl (preferably with a for loop) and change the extension HTML all to uppercase

Answer:

Method One:
#!/bin/sh for in ' Ls/oldboy/*. html ' do  mv $i ' echo $i |sed ' s#oldboy.html# Oldgirl. Html#g ' done

method Two:*.html

method Three:#!/bin//oldboy && for in ' ls ' do   str= ' echo $i |cut-c'  mv ${str}_oldboy.html ${str}_oldgril. Htmldone

3, Enterprise Shell face question 3: Batch Create special requirements user case

Batch Create 10 System account OLDBOY01-OLDBOY10 and set the password (password is random number, require characters and numbers and so on mixed)

Answer:

#!/bin/Bash forNinch{ on..Ten} DoPass= ' Uuidgen|cut-c1-Ten' ID oldboy$n&>/dev/NULL  if[$?-ne0];then useradd oldboy$n echo $pass|PASSWD--stdin oldboy$n &>/dev/NULLEcho-E"user:oldboy$n Pass: $pass">>/tmp/User.logElseEcho"Oldboy$n already exists"Fidone

4, Enterprise Shell face question 4: Scan Network Live host case

Write a shell script to determine what IP is currently online in the 10.0.0.0/24 network.

Answer:

#!/bin//etc/init.d/functions for in {1.. 254 } do10.0.     0. $ip &>/dev/null   if 0] then "      10.0.0. $ip" /bin/true  fidone

5, Enterprise Shell face question 5: Solve the Dos attack production case

Write a shell script to solve the DOS attack production case. Depending on the Web log or the number of network connections, monitoring when an IP concurrent connection number or a short time PV reaches 100 (readers according to the actual situation set), that is, call the firewall command to block the corresponding IP. The firewall command is: iptables-i input-s IP Address-j DROP

Answer:

2017 the latest enterprise Shell face test and enterprise operation and maintenance of a total of 30 cases