How to add path with space in Bash variable
mount /dev/sda9 “$games” As mentioned, always quote variable dereferences. Otherwise, the shell confuses the spaces in the variable’s value as spaces separating multiple values.
terminal
How do I determine if a terminal is color-capable?
A friend pointed me towards tput(1), and I cooked up this solution: #!/bin/sh # ack-wrapper – use tput to try and detect whether the terminal is # color-capable, and call ack-grep accordingly. OPTION=’–nocolor’ COLORS=$(tput colors 2> /dev/null) if [ $? = 0 ] && [ $COLORS -gt 2 ]; then OPTION=” fi exec ack-grep $OPTION … Read more
Can’t find x11 terminal in gnuplot Octave on Mac OS
I found the answer here. Basically gnuplot needs to be reinstalled as: brew reinstall gnuplot –with-x11 This page also helps with troubleshooting Octave installation on Mavericks.
The new way to configure default shell and argument commands in VSCode?
In the settings.json file we need to have the following “terminal.integrated.profiles.windows”: { “PowerShell”: { “source”: “PowerShell”, “icon”: “terminal-powershell” }, “Command Prompt”: { “path”: [ “${env:windir}\\Sysnative\\cmd.exe”, “${env:windir}\\System32\\cmd.exe” ], “args”: [], “icon”: “terminal-cmd” }, “Git Bash”: { “source”: “Git Bash” } }, And set the default terminal by adding “terminal.integrated.defaultProfile.windows”: “Command Prompt”, We can achieve this by … Read more
How do I view my environment variables?
Printing the Environment from the Shell As other answers have pointed out, one can use /usr/bin/env or /usr/bin/printenv from the command line to see what the environment is in the shell before starting Rails, or in a subshell after starting it. For example: rails s RETURN CTRL-Z env RETURN fg RETURN Displaying ENV from the … Read more
Scapy installation fails due to invalid token
Update: scapy-python3 is deprecated (2018) and will no longer be updated. scapy>=2.4.0 has merged python 3 compatibility. The most up-to-date installation method is now pip3 install scapy>=2.4.0 You may check the installation page in the documentation for other installation methods Original answer: Perhaps you are trying to install the package scapy for Python 2, but … Read more
What command makes a new file in terminal?
On Linux there are mutiple options The typical used one is touch touch bar.txt However you may also use echo if you want to create and write to the file right away The following command tells to create bar.txt and put foo inside of it echo foo > bar.txt You may also use >> which … Read more
use conditional in bash script to check string argument
What about the shorter : #!/bin/bash [[ $1 == A ]] && echo “A” || echo “not A” ? And a beginner version (identical logic) : #!/bin/bash if [[ $1 == A ]]; then echo “A” else echo “not A” fi Like Scott said, you have a syntax error (missing space). explanations I use boolean … Read more
Shortening my prompt in Zsh
Old question, I know, but as an alternative solution I just discovered powerlevel9k, an extension of agnoster (they appear practically identical bar a fair few tweaks), which has this functionality built in. Just set it as your zsh theme, then in .zshrc set POWERLEVEL9K_SHORTEN_DIR_LENGTH=2 which ensures that only two directories are listed. Alternate options are … Read more
Search for files & file names using silver searcher
According to the man page of ag -G –file-search-regex PATTERN Only search files whose names match PATTERN. You can use the -G option to perform searches on files matching a pattern. So, to answer your question: root@apache107:~/rpm-4.12.0.1# ag -G cpio.c size rpm2cpio.c 21: off_t payload_size; 73: /* Retrieve payload size and compression type. */ 76: … Read more