check if file exists in bash code example
Example 1: check if file exists bash
FILE=/etc/resolv.conf
if [ -f "$FILE" ]; then
echo "$FILE exists."
else
echo "$FILE does not exist."
fi
Example 2: .sh script: check if file exist
#!/bin/bash
if [ -e x.txt ]
then
echo "ok"
else
echo "nok"
fi
Example 3: bash script if file exists
[ -f /etc/resolv.conf ] && echo "$FILE exists."
Example 4: bash check if string does not exist in file
Just use grep with flags 'F' (fixed string), 'x' (exact match) and 'q'
(quiet output) in order to check if a word string is in a file
if ! grep -Fxq "string" file.txt; then