if [ ! -z err−o!−eapk ]; then 会报出-e无法找到的错误; 而if [ ! -z err]||[!−eapk ]; then 没问题; 整数比较 : -eq 等于,如:if [ "a"−eq"b" ] -ne 不等于,如:if [ "a"−ne"b" ] -gt 大于,如:if [ "a"−gt"b" ] -ge 大于等于,如:if [ "a"−ge...
:n and :p commands. If the filename consists of several files, they are all inserted into the list of files and the first one is examined. If the filename contains one or more spaces, the entire filename should be enclosed in double quotes (also see the -" option). ^X^V or E S...
echo " null line $file2" if [ "$file1" -gt "$file2" ]; then echo " max null line file is $1,null line num is $file1" fi if [ "$file1" -lt "$file2" ]; then echo " max null line file is $2,null line is $file2" fi if [ "$file3" -gt "$file4" ]; then ec...
[@]}" do file=${cPath}${name}".txt" if [ -e $file ]; then # 文件是否存在 # echo -n 不换行输出 echo -n $file' exists. now delete it.' echo ${file} rm ${file} else echo $file' not exists. now create it and make it executable.' touch $file chmod a+x $file fi ...
Size is > 0 bytes [[ -f FILE ]] # File [[ -x FILE ]] # Executable [[ FILE1 -nt FILE2 ]] # 1 is more recent than 2 [[ FILE1 -ot FILE2 ]] # 2 is more recent than 1 [[ FILE1 -ef FILE2 ]] # Same files if [[ -e "file.txt" ]]; then echo "file exists" fi...
其中,pattern1、pattern2、pattern3是要匹配和删除的模式,file.txt是要操作的文件名。该命令会将不匹配的行输出到临时文件temp.txt,然后再将临时文件重命名为原文件名file.txt,实现删除匹配的行。 以上是两种常用的方法来删除bash中的多个匹配。这些方法适用于各种情况,例如删除文件中的特定行、删除匹配某个模式的行...
'-)# Check if the temporary file exists and delete it if presentif[ -f"temp.txt"];thenrmtemp.txtfi# Replace special characters from "desc=" to the end of each line in semi.txtecho"$xidel_output"| sed -e"s/desc=\(.*\)\(['\"]\)/desc=\1 /g"> semi.txt ...
22 # 23 # 使用'diff'命令也可以, 比如, diff $1 $2 &> /dev/null 24 25 if [ $? -eq 0 ] # 测试"cmp"命令的退出状态. 26 then 27 echo "File \"$1\" is identical to file \"$2\"." 28 else 29 echo "File \"$1\" differs from file \"$2\"." 30...
需要清空的文件夹路径 dir_path="/path/to/folder" # 判断文件夹是否存在 if [ ! -d $dir_path ]; then echo "Directory $dir_path not exists" exit 1 fi # 删除指定类型文件 find $dir_path -type f -name "*$file_type" -delete echo "All $file_type files in $dir_path deleted ...
Delete a File: Write a Bash script that deletes a file named "file1.txt". Code: #!/bin/bash# Check if the file "file1.txt" existsif[-f"file1.txt"];then# Delete the filermfile1.txt# Check if the deletion was successfulif[$?-eq0];thenecho"File 'file1.txt' deleted successf...