使用shell判斷路徑或檔案是否存在

用shell進行判斷

#!/bin/sh myPath="/var/log/httpd/" myFile="/var /log/httpd/access.log" <pre name="code" class="cpp" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 24px;"><span style="font-family: arial, 'courier new', courier, 宋體, monospace, 'Microsoft YaHei'; white-space: pre-wrap;">#-x 參數判斷$myPath是否存在並且是否具有可執行許可權 </span>

if [ ! -x "$myPath"]; then mkdir "$myPath" fi # 這裡的-d 參數判斷$myPath是否存在 if [ ! -d "$myPath"]; then mkdir "$myPath" fi # 這裡的-f參數判斷$myFile是否存在 if [ ! -f "$myFile" ]; then touch "$myFile" fi # 其他參數還有-n,-n是判斷一個變數是否是否有值 if [ ! -n "$myVar" ]; then echo "$myVar is empty" exit 0 fi # 兩個變數判斷是否相等 if [ "$var1" = "$var2" ]; then echo '$var1 eq $var2' else echo '$var1 not eq $var2' fi -f 和-e的區別 Conditional Logic on Files -a file exists. -b file exists and is a block special file. -c file exists and is a character special file. -d file exists and is a directory. -e file exists (just the same as -a). -f file exists and is a regular file. -g file exists and has its setgid(2) bit set. -G file exists and has the same group ID as this process. -k file exists and has its sticky bit set. -L file exists and is a symbolic link. -n string length is not zero. -o Named option is set on. -O file exists and is owned by the user ID of this process. -p file exists and is a first in, first out (FIFO) special file or named pipe. -r file exists and is readable by the current process. -s file exists and has a size greater than zero. -S file exists and is a socket. -t file descriptor number fildes is open and associated with a terminal device. -u file exists and has its setuid(2) bit set. -w file exists and is writable by the current process. -x file exists and is executable by the current process. -z string length is zero. 是用 -s 還是用 -f 這個區別是很大的。