shell scripting

scripting – performance improvement with file open

2020/04/20

Sometimes just one line of code can make all the difference. I will show you with example.  Here is script with 2 functions. Both are writing some lines of text to a file. First function, “a” I have …

Fix weird flux menu

2017/05/03

Some distro’s just add all the items under single menu and thus the menu itself becomes unusable because of the number of items in the submenu and this I did not like and hence ceated this simply …

change the output format for time command

2016/08/16

If you are doing some scripting and using ‘time’ command, then you know sometimes it becomes difficult to capture the output as the output would be something like this: : amit ; time ls real 0m0.002s …

Generate random string for various use case

2016/08/08

Some times I need random string, for example to use as email seperator or to use in some API. One way is to use tools like /dev/[u]random or od and other such. But they seem cubersome after I figured …

bash – refer the first parameter from last command quickly

2014/09/22

To refer to first parameter from the last command quickly, you can use !^ Note: This can also be referred as “!!:1“


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