Linux入门(五)

本篇文章主要讲述下文件处理相关的命令

1: 显示权限

ls -lh

总用量 36K
drwxrwxr-x 5 zh zh 4.0K 2月 28 16:47 app
-rw-rw-r-- 1 zh zh 530 2月 22 18:25 build.gradle
drwxrwxr-x 3 zh zh 4.0K 2月 22 18:25 gradle
-rw-rw-r-- 1 zh zh 1.1K 2月 26 08:58 gradle.properties
-rwxrw-r-- 1 zh zh 5.2K 2月 22 18:25 gradlew
-rw-rw-r-- 1 zh zh 2.3K 2月 22 18:25 gradlew.bat
-rw-rw-r-- 1 zh zh 452 2月 22 18:25 local.properties
-rw-rw-r-- 1 zh zh 43 2月 22 18:25 settings.gradle

2: 查看文件内容(一)

cat命令查看文件内容:

cat build.gradle

可以看到build.gradle的内容从第一个字节开始正常输出.

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
 repositories {
 google()
 jcenter()
 }
 dependencies {
 classpath "com.android.tools.build:gradle:4.1.2"
 // NOTE: Do not place your application dependencies here; they belong
 // in the individual module build.gradle files
 }
}
allprojects {
 repositories {
 google()
 jcenter()
 }
}
task clean(type: Delete) {
 delete rootProject.buildDir
}

而tac命令可以从最后一行反向查看.

tac build.gradle

} delete rootProject.buildDir
task clean(type: Delete) {
}
 }
 jcenter()
 google()
 repositories {
allprojects {
}
 }
 // in the individual module build.gradle files
 // NOTE: Do not place your application dependencies here; they belong
 classpath "com.android.tools.build:gradle:4.1.2"
 dependencies {
 }
 jcenter()
 google()
 repositories {
buildscript {
// Top-level build file where you can add configuration options common to all sub-projects/modules.

3: 查看文件内容(二)

使用more命令查看文件内容:

more build.gradle

4: 按行查看文件内容

查看一个文件的前几行可以使用head命令:

head -5 build.gradle

执行结果输出build.gradle的前5行数据.

使用tail命令可以查看文件的最后几行:

tail -5 build.gradle

5: 实时查看文件内容

tail -f 命令可以实时的监测文件变动

tail -f settings.gradle 
include ':app'
rootProject.name = "WebTest"tail: settings.gradle：文件已截断
include ':app'
rootProject.name = "WebTest"
rootProject.name = "WebTest"tail: settings.gradle：文件已截断
include ':app'
rootProject.name = "WebTest"
rootProject.name = "WebTest"rootProject.name = "WebTest"tail: settings.gradle：文件已截断
include ':app'
rootProject.name = "WebTest"

6: 文件内容查找

在文件中查找关键词app:

grep app settings.gradle

在文件中查找以rootProject开始的词汇:

grep ^rootProject settings.gradle

在文件查找所有包含数字的行:

grep [0-9] settings.gradle

忽略大小写查找:

grep -i "web" settings.gradle

查找多个文件:

grep -i "rootProject" settings.gradle build.gradle 
settings.gradle:rootProject.name = "WebTest"
settings.gradle: delete rootProject.buildDir
build.gradle: delete rootProject.buildDir

指定目录查找(包含子目录并且递归查找):

grep -r "xxxxx" app/
匹配到二进制文件 app/build/intermediates/dex/debug/mergeDexDebug/classes.dex
匹配到二进制文件 app/build/intermediates/javac/debug/classes/com/test/webtest/MainActivity.class
匹配到二进制文件 app/build/intermediates/javac/debug/classes/com/test/webtest/WebActivity$1.class
匹配到二进制文件 app/build/intermediates/javac/debug/classes/com/test/webtest/WebActivity.class
匹配到二进制文件 app/build/intermediates/external_libs_dex/debug/mergeExtDexDebug/classes.dex
匹配到二进制文件 app/build/intermediates/project_dex_archive/debug/out/com/test/webtest/MainActivity.dex
匹配到二进制文件 app/build/intermediates/project_dex_archive/debug/out/com/test/webtest/WebActivity.dex
匹配到二进制文件 app/build/intermediates/project_dex_archive/debug/out/com/test/webtest/WebActivity$1.dex
app/src/main/java/com/test/webtest/MainActivity.java: Log.i("xxxxx", "changeScreenOffTime: "+System.currentTimeMillis());
app/src/main/java/com/test/webtest/MainActivity.java: Log.i("xxxxx", "changeScreenOffTime: "+anInt);
app/src/main/java/com/test/webtest/WebActivity.java: Log.i("xxxxx", "handleMessage: " + num++);
app/src/main/java/com/test/webtest/WebActivity.java: Log.i("xxxxx", "getRandom: "+index);

本文由博客一文多发平台 OpenWrite 发布！