Changes between Version 8 and Version 9 of Csle2022/Agenda/scriptingandgithub
- Timestamp:
- Nov 1, 2022, 2:18:32 PM (2 years ago)
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Csle2022/Agenda/scriptingandgithub
v8 v9 25 25 And create the content in it 26 26 27 {{{ 27 28 #!/bin/sh 28 29 echo 'Hello World' 30 }}} 29 31 30 32 `#!/bin/sh` is "how to run" the program. … … 50 52 51 53 Variables can be defined using the syntax ` variable_name=value`. To get the value of the variable, add `$` before the variable 52 54 {{{ 53 55 #!/bin/bash 54 56 # A simple variable example … … 56 58 name=world 57 59 echo $greeting $name 60 }}} 58 61 59 62 ===== Arithmetic Expressions ===== … … 61 64 These are the operstors supported by bash for mathematical calculations. 62 65 66 {{{ 63 67 + addition 64 68 - subtraction … … 67 71 ** exponentiation 68 72 % modulus 73 }}} 69 74 70 75 Numerical expressions can also be calculated and stored in a variable using the syntax below: … … 72 77 `value=$((expression))` 73 78 79 {{{ 74 80 #!/bin/bash 75 81 76 82 var=$((3+9)) 77 83 echo $var 84 }}} 78 85 79 86 ===== How to read user input ===== … … 93 100 Comparison is used to check if statements evaluate to true or false. 94 101 102 {{{ 95 103 Equality num1 -eq num2 is num1 equal to num2 96 104 Greater than equal to num1 -ge num2 is num1 greater than equal to num2 … … 99 107 Less than num1 -lt num2 is num1 less than num2 100 108 Not Equal to num1 -ne num2 is num1 not equal to num2 109 }}} 101 110 102 111 Syntax: 103 112 113 {{{ 104 114 if [ conditions ] 105 115 then 106 116 commands 107 117 fi 118 }}} 108 119 109 120 ===== Conditional Statements (Decision Making) ===== … … 117 128 Looping with numbers: 118 129 130 {{{ 119 131 #!/bin/bash 120 132 … … 123 135 echo $i 124 136 done 137 }}} 125 138 126 139 Looping with strings: 127 140 141 {{{ 128 142 #!/bin/bash 129 143 … … 132 146 echo $X 133 147 done 148 }}} 134 149 135 150 ====== While loop ====== … … 137 152 While loops check for a condition and loop until the condition remains true. We need to provide a counter statement that increments the counter to control loop execution. 138 153 154 {{{ 139 155 #!/bin/bash 140 156 i=1 … … 143 159 (( i += 1 )) 144 160 done 161 }}} 145 162 146 163 Reading files: … … 148 165 Suppose we have a file sample_file.txt as shown below: 149 166 167 {{{ 150 168 #!/bin/bash 151 169 … … 157 175 ((LINE++)) 158 176 done < "sample_file.txt" 159 160 161 162 = = Github administration ==177 }}} 178 179 180 = Github administration = 163 181 164 182 Creating a repository … … 196 214 git commit -m “my first commit” 197 215 198 === Using public git-hub packages (installing, upgrading) === 199 200 === Creating own private repository === 201 202 203 There aren't any special steps required to create a private GitHub repository. They're exactly the same as if you were to create a standard GitHub repository, albeit with one difference: You click the radio button for the Private option 204 205 216 217 218 219
