What is cp: cannot stat error in Unix, I get this error when trying to copy thing from one folder to another
If your source directory is set in quotes, then make sure that the * is outside the quotes, i.e. or
bash
Which characters need to be escaped when using Bash?
There are two easy and safe rules which work not only in sh but also bash. 1. Put the whole string in single quotes This works for all chars except single quote itself. To escape the single quote, close the quoting before it, insert the single quote, and re-open the quoting. sed command: sed -e “s/’/’\\\\”/g; 1s/^/’/; \$s/\$/’/” 2. … Read more
How to change the output color of echo in Linux
You can use these ANSI escape codes: And then use them like this in your script: which prints love in red. From @james-lim’s comment, if you are using the echo command, be sure to use the -e flag to allow backslash escapes. (don’t add “\n” when using echo unless you want to add an additional empty line)
Pass variable from one Jenkins stage to others in sh
You can output the variables to same file in stage, then read back and assign to env at the beginning of each stage as following:
How can I kill a process by name instead of PID, on Linux?
More information: http://linux.about.com/library/cmd/blcmdl1_pkill.htm
How can I count all the lines of code in a directory recursively?
Try: or (when file names include special characters such as spaces) The SLOCCount tool may help as well. It will give an accurate source lines of code count for whatever hierarchy you point it at, as well as some additional stats. Sorted output: find . -name ‘*.php’ | xargs wc -l | sort -nr
Emulating a do-while loop in Bash
Two simple solutions: Execute your code once before the while loopactions() { check_if_file_present # Do other stuff } actions #1st execution while [ current_time <= $cutoff ]; do actions # Loop execution done Or:while : ; do actions [[ current_time <= $cutoff ]] || break done
Is bash a programming language?
We can say that yes, it is a programming language. According to man bash, Bash is a “sh-compatible command language”. Then, we can say a “command language” is “a programming language through which a user communicates with the operating system or an application”. From man bash: DESCRIPTION Bash is an sh-compatible command language interpreter that executes commands read from … Read more
Return value in a Bash function
Although Bash has a return statement, the only thing you can specify with it is the function’s own exit status (a value between 0 and 255, 0 meaning “success”). So return is not what you want. You might want to convert your return statement to an echo statement – that way your function output could be captured using $() braces, which seems to be exactly what you want. Here is … Read more
Using find command in bash script
Welcome to bash. It’s an old, dark and mysterious thing, capable of great magic. 🙂 The option you’re asking about is for the find command though, not for bash. From your command line, you can man find to see the options. The one you’re looking for is -o for “or”: That said … Don’t do this. Storage like this may work for simple … Read more