Linux

a – unary, assignment and logical operators in shell scriptsShell scripts use various operators to perform operations on variables, strings, numbers, and other data types.Common categories of operators used in shell scripts:Unary, Arithmetic, Relational, Logical, assignment, file test , string and bit operatorsUnary refers to the number of operands, so they take one operand.There are…

a – bc introduction in shell scriptsbc reads input from standard input (stdin) and outputs results to standard output (stdout).You can use it within a shell script by piping expressions to it or by using here documentsWhile basic arithmetic can be done using $((…)) or expr, it is limited to integer operations …and does not…

a – Arrays in shells scripts Part 1arrays are used to store multiple values under a single variable nameArrays are zero-indexed and declared with ()Use quotes to preserve spaces and avoid word splitting.Use ${array[@]} in loops for correct iteration.Associative arrays (with declare -A) allow key-value mapping.Bash does not support native multi-dimensional arrays, but can simulate…

OutlineLinux Command Line1 – Introduction2 – Filesystem Navigation Introduction Current working directory User’s home directory3 – ls, file and less commands ls file less4 – Symbolic and Hard links Symbolic Links Hard links5 – wildcards 6 – make directory, copy, move, rename, delete files and directories make/delete directories copy files/directories move and rename files7 -…