四剑客第三关
1 find使用方法：
根据文件大小查找 命令：
根据文件权限查找数据 ：
find /etc/passwd -type f -size +10M
find /etc/passwd -perm 755
[root@master ~]# find /etc/passwd -type f -size +10M
[root@master ~]# find /etc/passwd -perm 755
2 把 abc压缩成格式如 2020-09-29.abc.tar.gz
tar -zcf "$(date +%Y-%m-%d).abc.tar.gz" abc
[root@master ~]# cat abc
dshjfgsd
sdkfhksdf
sdkfgsdf
flksehfhes
sakhjfasjghdfas
fjnksdfsdjf
sdfjkhsdjfse
sajkefhjsegf
wenrjeshfukse
wejnrkhefghwe
rasejghfujiwebf
'fsebjfhse
ejkrgsefhe
sekfbegfe
askefseuifbwejfsekjtg
wjkerusegufhbse
sejnkrghsehjfge
tnwejfhwejfbwe
asnjefghesjkf
se'e,k
ejkrgseuiuhe
enrjsehfwe
awejkfjiwehf
sejkhrsehfw
'arnweh
serheuishfuihwe
[root@master ~]# tar -zcf "$(date +%Y-%m-%d).abc.tar.gz" abc
[root@master ~]# ls
10.txt 14.txt 18.txt 20.txt 3.txt 7.txt anaconda-ks.cfg nwq1.6.sh
11.txt 15.txt 19.txt 21.txt 4.txt 8.txt CentOS6-Base-163.repo profile
12.txt 16.txt 1.txt 22.txt 5.txt 9.txt hosts
13.txt 17.txt 2024-03-14.abc.tar.gz 2.txt 6.txt abc motd
3 解压如上文件
tar -xzf "2020=09-29.abc.tar.gz"
tar -xzf "2024-03-14.abc.tar.gz" -C /test 解压到目录
[root@master ~]# tar -xzf "2024-03-14.abc.tar.gz" -C /test
[root@master ~]# cd /test
[root@master test]# ls
abc
[root@master test]# cat abc
dshjfgsd
sdkfhksdf
sdkfgsdf
flksehfhes
sakhjfasjghdfas
fjnksdfsdjf
sdfjkhsdjfse
sajkefhjsegf
wenrjeshfukse
wejnrkhefghwe
rasejghfujiwebf
'fsebjfhse
ejkrgsefhe
sekfbegfe
askefseuifbwejfsekjtg
wjkerusegufhbse
sejnkrghsehjfge
tnwejfhwejfbwe
asnjefghesjkf
se'e,k
ejkrgseuiuhe
enrjsehfwe
awejkfjiwehf
sejkhrsehfw
'arnweh
serheuishfuihwe
4 美元符号：$ 表达什么：
！作用：
| 作用：
xargs作用：
$ 引用变量或命令替换
! 执行历史记录或逻辑非操作 通常与[]结合使用
| 前一个命令的输出作为后一个命令的输入
5 查找指定数据信息进行复制 查找出.txt文件,批量复制到/tmp目录
find . -name "*.txt" |xargs cp -t /tmp
或者
find . -name "*.txt" -exec cp {} /tmp \;
[root@master ~]# touch {1..22}.txt
[root@master ~]# ls
10.txt 13.txt 16.txt 19.txt 21.txt 3.txt 6.txt 9.txt hosts profile
11.txt 14.txt 17.txt 1.txt 22.txt 4.txt 7.txt anaconda-ks.cfg motd
12.txt 15.txt 18.txt 20.txt 2.txt 5.txt 8.txt CentOS6-Base-163.repo nwq1.6.sh
[root@master ~]# find . -name "*.txt" -exec cp {} /tmp \;
[root@master ~]# ls
10.txt 13.txt 16.txt 19.txt 21.txt 3.txt 6.txt 9.txt hosts profile
11.txt 14.txt 17.txt 1.txt 22.txt 4.txt 7.txt anaconda-ks.cfg motd
12.txt 15.txt 18.txt 20.txt 2.txt 5.txt 8.txt CentOS6-Base-163.repo nwq1.6.sh
[root@master ~]# cd /tmp
[root@master tmp]# ls
10.txt 14.txt 18.txt 21.txt 4.txt 8.txt yum_save_tx.2024-03-09.20-43.MjeG_P.yumtx
11.txt 15.txt 19.txt 22.txt 5.txt 9.txt
12.txt 16.txt 1.txt 2.txt 6.txt test01.txt
13.txt 17.txt 20.txt 3.txt 7.txt test.txt
6 查找指定数据信息进行移动 查找出*.txt文件,批量移动到/tmp目录
find . -name "*.txt" -exec mv {} /tmp \;
[root@master ~]# touch {1..20}.txt
[root@master ~]# ls
10.txt 13.txt 16.txt 19.txt 2.txt 5.txt 8.txt CentOS6-Base-163.repo nwq1.6.sh test.txt
11.txt 14.txt 17.txt 1.txt 3.txt 6.txt 9.txt hosts profile
12.txt 15.txt 18.txt 20.txt 4.txt 7.txt anaconda-ks.cfg motd test01.txt
[root@master ~]# find . -name "*.txt"
./1.txt
./test.txt
./test01.txt
./2.txt
./3.txt
./4.txt
./5.txt
./6.txt
./7.txt
./8.txt
./9.txt
./10.txt
./11.txt
./12.txt
./13.txt
./14.txt
./15.txt
./16.txt
./17.txt
./18.txt
./19.txt
./20.txt
[root@master ~]# find . -name "*.txt" -exec mv {} /tmp \;
[root@master ~]# cd /tmp
[root@master tmp]# ls
10.txt 13.txt 16.txt 19.txt 2.txt 5.txt 8.txt test.txt
11.txt 14.txt 17.txt 1.txt 3.txt 6.txt 9.txt yum_save_tx.2024-03-09.20-43.MjeG_P.yumtx
12.txt 15.txt 18.txt 20.txt 4.txt 7.txt test01.txt
7 将以abc开头的行找出来?
语法 grep "^abc" 文件名
grep "^abc" /etc/passwd
[root@master ~]# cat test01.txt
sdjfgs
sdjkhfjksdhf
sdfjksdkfhshd
sdjfhjsgf
sdkfhksduise
jkshfhsdb
ashdfsdf
linux fsdhfsdfjsfhshdfslinux
sdjfjsdfs
askjdfasugfugsef
sensfhasgf
asekfsehf
eksheshb
abcehiehkheke
ejkrsehfuies
abcehiiegbwejthiehi
efjhehew
rjkthrkhgwe
eklrhteh
etwehut
ethkeht
ejkfekhre
ehrkefie
nrekwhwet
ekhke
ektheh
[root@master ~]# grep '^abc' test01.txt
abcehiehkheke
abcehiiegbwejthiehi
8 将以linux结尾的行找出来?
grep 'linux$' 文件名
[root@master ~]# cat test01.txt
sdjfgs
sdjkhfjksdhf
sdfjksdkfhshd
sdjfhjsgf
sdkfhksduise
jkshfhsdb
ashdfsdf
linux fsdhfsdfjsfhshdfslinux
sdjfjsdfs
askjdfasugfugsef
sensfhasgf
asekfsehf
eksheshb
abcehiehkheke
ejkrsehfuies
abcehiiegbwejthiehi
efjhehew
rjkthrkhgwe
eklrhteh
etwehut
ethkeht
ejkfekhre
ehrkefie
nrekwhwet
ekhke
ektheh
[root@master ~]# grep 'linux' test01.txt
linux fsdhfsdfjsfhshdfslinux
9 将全部内容显示,但不要显示空行
grep -v '^$' 文件名
[root@master ~]# cat test01.txt
sdjfgs
sdjkhfjksdhf
sdfjksdkfhshd
sdjfhjsgf
sdkfhksduise
jkshfhsdb
ashdfsdf
linux fsdhfsdfjsfhshdfslinux
sdjfjsdfs
askjdfasugfugsef
sensfhasgf
asekfsehf
eksheshb
abcehiehkheke
ejkrsehfuies
abcehiiegbwejthiehi
efjhehew
rjkthrkhgwe
eklrhteh
etwehut
ethkeht
ejkfekhre
ehrkefie
nrekwhwet
ekhke
ektheh
[root@master ~]# grep -v '^$' test01.txt
sdjfgs
sdjkhfjksdhf
sdfjksdkfhshd
sdjfhjsgf
sdkfhksduise
jkshfhsdb
ashdfsdf
linux fsdhfsdfjsfhshdfslinux
sdjfjsdfs
askjdfasugfugsef
sensfhasgf
asekfsehf
eksheshb
abcehiehkheke
ejkrsehfuies
abcehiiegbwejthiehi
efjhehew
rjkthrkhgwe
eklrhteh
etwehut
ethkeht
ejkfekhre
ehrkefie
nrekwhwet
ekhke
ektheh
10 利用linux什么命令真正统计目录的大小?
du -sh /etc/passwd
[root@master ~]# du -sh /etc/passwd
8.0K /etc/passwd