Core skills to become unix admin

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DOMAIN AND SSL

virtual host configuration in Linux: 1. Buy a domain from godaddy etc. 2. Must have server to host this domain with static IP. 3. After buying this domain update dns records/name server in go daddy(name server of your service provider where you buy a server) 4.Now create zone for your domain to update records A etc in name server of your service provider where you buy a server and this name server is managed by sp so you need to ask them to update. Note: There can be two different name servers for zones (DNS-forward, RDNS-reverse) 5.Now as usual install package httpd,apache,ngnix,tomcat (different webservers) in the server. 6.for ex , for http go to virtual host conf file and add this domain(check online for more info) SSL configuration in Linux: 1.Generate csr and private key to ssl provider 2.They give crt file,bundle file once you purchase 3.Before step 4 you should have crt file  which is saved domain.crt(mycloud.com.crt),bundle file and key 4.Now in the server ...
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Usage of find command

 Usage of find command The Linux  Find Command  is one of the most important and much used command in Linux sytems. Find command used to search and locate list of files and directories based on conditions you specify for files that match the arguments. Find can be used in variety of conditions like you can find files by  permissions ,  users ,  groups ,  file type ,  date ,  size  and other possible criteria. 1. find files using name (in current directory) find . -name neelu.txt ./neelu.txt find /home -name neelu.txt (in home directory) 2. find files using name and ignore case. find /home -iname techmint.txt 3. find directories using name (done by inserting flag -type d) find /var/log -type d -name divya 4. find file types using name (done by inserting flag -type f) find /var/log -type f -name web.php (find php files) 5. find files with 777 permissions find /etc -type f -perm 777 -print ...
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variables in shell scripting

variables in shell scripting: Shell variables are created once they are assigned a value. A variable can contain a number, a character or a string of characters. Variable name is case sensitive and can consist of a combination of letters and the underscore "_". Value assignment is done using the "=" sign. Note that no space permitted on either side of = sign when initializing variables. EX: PRICE_PER_APPLE = 5 MyFirstLetters = ABC greeting = 'Hello world!'   1. A backslash "\" is used to escape special character meaning   EX: PRICE_PER_APPLE = 5 echo "The price of an Apple today is: \ $HK $PRICE_PER_APPLE " o/p: The price of an Apple today is: $HK 5     2. Encapsulating the variable name with ${} is used to avoid ambiguity   EX: MyFirstLetters = ABC echo "The first 10 letters in the alphabet are: ${MyFirstLetters} DEFGHIJ" o/p: The first 10 letters in the alphabet are: ABCDEFGHIJ   3. Encap...
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