str1 = str2<\/p>\n
str1 != str2<\/p>\n
str1 < str2<\/p>\n
str1 > str2<\/p>\n
-n str1 \u00a0\u00a0str1\u4e3a\u975enull\uff08\u957f\u5ea6\u5927\u4e8e0\uff09<\/p>\n
-z str1 \u00a0\u00a0str1\u4e3a\u975enull\uff08\u957f\u5ea6\u4e3a0\uff09<\/p>\n
<\/p>\n
\u5e38\u7528\u64cd\u4f5c\u7b26\uff08\u4e3a\u771f\uff09<\/p>\n
-b \u5757\u8bbe\u5907\u6587\u4ef6<\/p>\n
-c \u5b57\u7b26\u8bbe\u5907\u6587\u4ef6<\/p>\n
-d \u76ee\u5f55<\/p>\n
-e \u5b58\u5728<\/p>\n
-f \u4e00\u822c\u6587\u4ef6<\/p>\n
-g file file\u6709\u8bbe\u7f6e\u5b83\u7684setgid\u4f4d<\/p>\n
-h \u7b26\u53f7\u94fe\u63a5<\/p>\n
-L \u7b26\u53f7\u94fe\u63a5<\/p>\n
-p \u7ba1\u9053<\/p>\n
-r \u53ef\u8bfb<\/p>\n
-S \u5957\u63a5\u5b57<\/p>\n
-s \u975e\u7a7a<\/p>\n
-u file\u6709\u8bbe\u7f6e\u5b83\u7684setgid\u4f4d<\/p>\n
-w \u53ef\u5199<\/p>\n
-x \u53ef\u6267\u884c\uff0c\u82e5\u662f\u76ee\u5f55\uff0c\u5219\u53ef\u88ab\u67e5\u627e<\/p>\n
-O file file\u7684\u6240\u6709\u8005<\/p>\n
-G file\u7684\u7ec4ID\u5339\u914d\u4f60\u7684ID<\/p>\n
file1 -nt file2 file1\u6bd4file2\u65b0<\/p>\n
file1 -ot file2 file1\u6bd4file2\u65e7<\/p>\n
<\/p>\n
<\/p>\n
#!\/bin\/bash<\/p>\n
# \u6d4b\u8bd5\u6587\u4ef6\u5224\u65ad\u64cd\u4f5c<\/p>\n
file = $1<\/p>\n
if [ -d $file ]<\/p>\n
then<\/p>\n
echo “$file is a directory.”<\/p>\n
elif [ -f $file ]<\/p>\n
then<\/p>\n
if [ -r $file ] && [ -w $file ] && [ -x $file ]<\/p>\n
then<\/p>\n
echo “you have read, write and excute permission on $file.”<\/p>\n
fi<\/p>\n
else<\/p>\n
echo “$file is neither a file nor a directory.”<\/p>\n
fi<\/p>\n
<\/p>\n
if [ “$1” = “-f” ]<\/p>\n
then<\/p>\n
…<\/p>\n
elif<\/p>\n
echo $1:unknown option >&2<\/p>\n
exit1<\/p>\n
fi<\/p>\n","protected":false},"excerpt":{"rendered":"
str1 = str2 str1 != str2 str1 < str2 str1 > str2 -n str1 \u00a0\u00a0str1\u4e3a\u975enull\uff08\u957f\u5ea6\u5927\u4e8e0\uff09 -z str1 \u00a0\u00a0str1\u4e3a\u975enull\uff08\u957f\u5ea6\u4e3a0\uff09 \u5e38\u7528\u64cd\u4f5c\u7b26\uff08\u4e3a\u771f\uff09 -b \u5757\u8bbe\u5907\u6587\u4ef6 -c \u5b57\u7b26\u8bbe\u5907\u6587\u4ef6 -d \u76ee\u5f55 -e \u5b58\u5728 -f \u4e00\u822c\u6587\u4ef6 -g file file\u6709\u8bbe\u7f6e\u5b83\u7684setgid\u4f4d -h \u7b26\u53f7\u94fe\u63a5 -L \u7b26\u53f7\u94fe\u63a5 -p \u7ba1\u9053 -r \u53ef\u8bfb -S \u5957\u63a5\u5b57 -s \u975e\u7a7a -u file\u6709\u8bbe\u7f6e\u5b83\u7684setgid\u4f4d -w \u53ef\u5199 -x …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-162","post","type-post","status-publish","format-standard","hentry","category-bdobq3k1tczue"],"_links":{"self":[{"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/posts\/162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/comments?post=162"}],"version-history":[{"count":1,"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/posts\/162\/revisions"}],"predecessor-version":[{"id":2325,"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/posts\/162\/revisions\/2325"}],"wp:attachment":[{"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/media?parent=162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/categories?post=162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eternalsphere.net\/echoes\/index.php\/wp-json\/wp\/v2\/tags?post=162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}