This question already has answers here: Closed 9 years ago.
Possible Duplicate: Shell script to append text to each file? How to append output to the end of text file in SHELL Script?
I'm trying to work out the best way to insert api details into a pre-existing config. I thought about using sed to insert the contents of the api text file to the bottom of the config.inc file. I've started the script but it doesn't work and it wipes the file.
#!/bin/bash
CONFIG=/home/user/config.inc
API=/home/user/api.txt
sed -e "\$a $API" > $CONFIG
What am I doing wrong?
This should work:
cat "$API" >> "$CONFIG"
You need to use the >> operator to append to a file. Redirecting with > causes the file to be overwritten. (truncated).
Follow WeChat
Success story sharing
Want to stay one step ahead of the latest teleworks?
Subscribe Now相似问题
- What is the difference between Python's list methods append and extend?
- How can I remove the first line of a text file using bash/sed script?
- How do I tell if a regular file does not exist in Bash?
- How to redirect and append both standard output and standard error to a file with Bash
- Looping through the content of a file in Bash
- How do I set a variable to the output of a command in Bash?
- How do I append to a file?
- Bash tool to get nth line from a file
- What is the preferred Bash shebang?
echolike thisecho "export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_112" >> ~/.bashrcechoinstead ofcat?catwrites the contents of the named files to stdout.echowrites the arguments to stdout. They do different things.moreis a bad choice. The purpose ofmoreis to buffer output to a tty and break it up into sections for interactive human consumption. There is nothing interactive about writing to a file. If some shell hasmoreas a builtin but notcatis an implementation detail.