In addition to backticks `command`, command substitution can be done with $(command) or “$(command)”, which I find easier to read, and allows for nesting. OUTPUT=$(ls -1) echo “${OUTPUT}” MULTILINE=$(ls \ -1) echo “${MULTILINE}” Quoting (“) does matter to preserve multi-line variable values; it is optional on the right-hand side of an assignment, as word splitting … Read more
Bash Space-Separated (e.g., –option argument) cat >/tmp/demo-space-separated.sh <<‘EOF’ #!/bin/bash POSITIONAL_ARGS=() while [[ $# -gt 0 ]]; do case $1 in -e|–extension) EXTENSION=”$2″ shift # past argument shift # past value ;; -s|–searchpath) SEARCHPATH=”$2″ shift # past argument shift # past value ;; –default) DEFAULT=YES shift # past argument ;; -*|–*) echo “Unknown option $1” exit … Read more
You can use these ANSI escape codes: Black 0;30 Dark Gray 1;30 Red 0;31 Light Red 1;31 Green 0;32 Light Green 1;32 Brown/Orange 0;33 Yellow 1;33 Blue 0;34 Light Blue 1;34 Purple 0;35 Light Purple 1;35 Cyan 0;36 Light Cyan 1;36 Light Gray 0;37 White 1;37 And then use them like this in your script: … Read more
Try: mysql -u username -p database_name < file.sql Check MySQL Options. Note 1: It is better to use the full path of the SQL file file.sql. Note 2: Use -R and –triggers to keep the routines and triggers of original database. They are not copied by default. Note 3 You may have to create the … Read more
Windows Server 2003 and later (i.e. anything after Windows XP 32 bit) provide the where.exe program which does some of what which does, though it matches all types of files, not just executable commands. (It does not match built-in shell commands like cd.) It will even accept wildcards, so where nt* finds all files in … Read more
The problem is that Xcode Command-line Tools needs to be updated. Solution #1 Go back to your terminal and enter: xcode-select –install You’ll then receive the following output: xcode-select: note: install requested for command line developer tools You will then be prompted in a window to update Xcode Command Line tools. (which may take a … Read more
scp -r user@your.server.example.com:/path/to/foo /home/user/Desktop/ By not including the trailing “https://stackoverflow.com/” at the end of foo, you will copy the directory itself (including contents), rather than only the contents of the directory. From man scp (See online manual) -r Recursively copy entire directories
With Python 2.6+ you can do: echo ‘{“foo”: “lorem”, “bar”: “ipsum”}’ | python -m json.tool or, if the JSON is in a file, you can do: python -m json.tool my_json.json if the JSON is from an internet source such as an API, you can use curl http://my_url/ | python -m json.tool For convenience in all … Read more