Marco 2016 new Linux+python high-end Operation fourth week

1. Display the line beginning with at least one blank character in/boot/grub/grub.conf;

[[email protected]/]# grep "^[[:space:]]\+"/boot/grub/grub.conf root (hd0,0) kernel/vmlinuz-2.6.32-504.el6.x86_64 ro ROOT=UUID=AA5CF6B3-E1B5-4EB2-95E6-E202F2890EDF Rd_no_luks RD_NO_LVM Lang=en_us. UTF-8 rd_no_md sysfont=latarcyrheb-sun16 crashkernel=auto keyboardtype=pc keytable=us Rd_NO_DM rhgb quietinitrd/ Initramfs-2.6.32-504.el6.x86_64.img

2, the display/etc/rc.d/rc.sysinit file with the beginning of #, followed by at least one white space character, and then have at least one non-whitespace character line;

[[email protected]/]# grep "^#[[:space:]]\+[^[:space:]]"/etc/rc.d/rc.sysinit

3, the Netstat-tan command execution results in the "LISTEN", followed by or with a blank character end of the line;

[[email protected] /]# netstat -tan | grep  "LISTEN[[:space:]]*$" tcp         0      0 0.0.0.0:22                   0.0.0.0:*                     LISTEN      tcp        0       0 127.0.0.1:631                0.0.0.0:*                    LISTEN      tcp         0      0 127.0.0.1:25                 0.0.0.0:*                    listen      tcp         0      0 0.0.0.0:80                   0.0.0.0: *                    LISTEN      tcp        0       0 :::22                        :::*                           listen      tcp        0      0 : :1:631                      :::*                          LISTEN       tcp        0      0 ::1:25                        :::*                          listen      [[email  protected] /]#

4, add user bash, Testbash, basher, Nologin (this one user's shell is/sbin/nologin), and then find the current system on its user name and the default shell of the same user information;

[Email protected]/]# grep-e ' ^ (\<[a-z]+\>). *\1$ '/etc/passwdsync:x:5:0:sync:/sbin:/bin/syncshutdown:x:6:0: shutdown:/sbin:/sbin/shutdownhalt:x:7:0:halt:/sbin:/sbin/haltnologin:x:501:501::/home/nologin:/sbin/ Nologinbash:x:502:502::/home/bash:/bin/bash[[email protected]/]#

5. Display the default shell of root, fedora or User1 user on the current system;

[Email protected]/]# grep-e ' ^ (root|fedora|user1) '/etc/passwdroot:x:0:0:root:/root:/bin/bash[[email protected]/]#

6. Find the line with a set of parentheses after a word in the/etc/rc.d/init.d/functions file, such as: Hello ();

[Email protected]/]# grep-e "[A-z]+\ (\)"/etc/rc.d/init.d/functions

7. Use the echo command to output an absolute path, use grep to remove its base name, expand: Take out its path name

[Email protected] network-scripts]# echo/etc/sysconfig/network-scripts | Grep-o "[^/]*$" Network-scripts[[email protected] network-scripts]# echo/etc/sysconfig/network-scripts | Grep-op "^.* (? =/)"/etc/sysconfig[[email protected] network-scripts]#

8, find out the results of the ifconfig command between 1-255 numbers;

[Email protected] ~]# Ifconfig | Egrep-o "[1-9]{1,2}|2[0-5]{1,2}"

9, Challenge: Write a mode, can match the reasonable IP address;

[Email protected] ~]# Ifconfig | Egrep-o "[1-9]{1,3}\. [1-9] {1,3}\. [1-9] {1,3}\. [1-9] {1,3} "192.168.1.8192.168.1.255192.168.1.25192.168.253.135192.168.253.255192.168.253.25[[email protected] ~]# Note: This will match numbers like 888.888.888.888, but the results in Ifconfig will not appear in dotted decimal numbers!! The lazy wording

10, Challenge: Write a pattern, can match out all the email address;

[email protected] ~]# Cat Mail.txt | grep ' [[: Alnum:]]\[email protected][[:alnum:]]\+\. [[: alnum:]]\+$ ' [email protected][email protected][email protected][email protected][[email protected] ~]# cat Mail.txt [Email protected]@126.com[email protected][email protected][email protected] @sina. Com[[email protected] ~]#

11. Find the main root of the/var directory, and belong to all files or directories of mail;

[Email protected] ~]# find/var-user root-group mail/var/spool/mail/var/spool/mail/root[[email protected] ~]#

12. Find files that are not owned or owned by the current system; further: Find files or directories that are not owned or owned by the current system and have been accessed in the last 3 days;

[[email protected]/]# Find/-nouser-o-nogroup [[email protected] ~]# Find/-nouser-o-nogroup-a-atime 3

13, find all the users in/etc directory have write permission files;

[Email protected] ~]# Find/etc-perm-222-ls

14. Find all files that are larger than 1M in/etc directory and are of normal file type;

[Email protected] ~]# find/etc-type f-size +1m-ls668012 7892-rw-r--r--1 root root 8080653 Jul 4 08:37 /etc/selinux/targeted/modules/active/policy.kern668019 7892-rw-r--r--1 root root 8080653 Jul 4 08:37/etc/se linux/targeted/policy/policy.24794284 1976-rw-r--r--1 root root 2020885 Jul 4 08:34/etc/gconf/gconf.xml.def Aults/%gconf-tree.xml[[email protected] ~]#

15, find/etc/init.d/directory, all users have execute permission, and other users have write permission files;

[Email protected] ~]# find/etc/init.d/-type f-perm-102-ls663307 0-rwxrwxrwx 1 root root 0 Jul 9 17:20/etc/init.d/test.txt

16. Find files that do not belong to root, bin or hadoop in the/usr directory;

[[email protected] ~]# touch/usr/2.txt[[email protected] ~]# chown test:test/usr/2.txt[[email protected] ~]# find/usr/  -type f! \ (-user root-o-user bin-o-user hadoop \)-ls400099 12-rwsr-xr-x 1 abrt abrt 10296 Oct 2014/usr/ libexec/abrt-action-install-debuginfo-to-abrt-cache395439 0-rw-r--r--1 Test test 0 Jul 9 17:29/usr /2.txt[[email protected] ~]#

17, to find at least one type of/etc/directory Users do not have write permission files;

[[email protected] ~]# find/etc/! -perm +222-ls

18. Find files whose contents have been modified and not rooted or Hadoop for the last week in/etc directory;

[Email protected] ~]# find/etc/-type f-ctime-7-A! \ (-user root-o-user hadoop \)-ls663346 4-rw-r--r--1 Test test 2 Jul 9 17:37/etc/2.txt[[email p Rotected] ~]#

Marco 2016 new Linux+python high-end Operation fourth week