Yahoo! JAPAN

2010/11/25 -For string equality comparison, use: if [[ "$s1" == "$s2" ]]. For string does NOT equal comparison, use: if [[ "$s1" != "$s2" ]].

2026/10/21 -Comparing strings is one of the most fundamental operations in Bash scripting. Use == and != for equality checks, =~ for regex matching, and -z ...

2023/3/13 -You can write an 'if' statement on a single line if you add ; : if [[ "str1" == "str2" ]]; then compare=true; else compare=false; fi.

2014/7/17 --eq is an arithmetic operator, which compares two numbers. Use = (portable/standard sh ), =~ or == instead.

2026/1/13 -Note that In Bash, you can either use = (single equal sign) or == (double equal sign) for string comparison. Before we can run this script, ...

2015/12/9 -I need to compare two strings and ignoring the case of the contents. IF [ $first != $second ]. Anything I can add to this command so that the ...

2013/1/30 -How can I have the if segment evaluate/compare the variable to a string input rather than an integer; a different error was required when using ...

2020/2/15 -Compare strings in Bash with =, ==, !=, -z and -n. Learn empty vs unset values, substring and glob matching, case-insensitive checks, ...

We can use the = operator in Bash to see if two strings are equal. For ... Learn about Linux BASH through theoretical and practical exercises ...