Linux Base entry three week job "Linux Micro Jobs"

1. Display all files or directories in the/var directory that start with L, end with a lowercase letter, and have at least one digit (can have other characters) appear in the middle.

ls-d/var/l*[0-9]*[[:lower:]] or ls-d/var/l*[[:d igit:]]*[[:lower:]]

Command test results

[Email protected] desktop]# touch/var/l0a/var/la1ab/var/lab2abc[[email protected] desktop]# ls-d/var/l*[0-9]*[[:low Er:]]/var/l0a/var/la1ab/var/lab2abc[[email protected] desktop]# ls-d/var/l*[[:d igit:]]*[[:lower:]]/var/l0a/var/la 1ab/var/lab2abc

2. Displays files or directories that start with any number in the/etc directory and end with a non-numeric number.

ls-d/etc/[0-9]*[^0-9] or ls-d/etc/[[:d igit:]]*[^[:d igit:]]

Command Test and Results

[[email protected] desktop]# Touch/etc/[email protected]/etc/1#bb[[email protected] desktop]# ls-d/etc/[0-9]*[^0-9]/e Tc/[email protected]/etc/1#bb[[email protected] desktop]# ls-d/etc/[[:d igit:]]*[^[:d igit:]]/etc/[email protected]/E Tc/1#bb

3, Show/etc directory, start with a non-letter, followed by a letter and any other arbitrary length of any character file or directory.

ls-d/etc/[^a-za-z][a-za-z]* or ls-d/etc/[^[:alpha:]][[:alpha:]]*

Command Test and Results

[Email protected] desktop]# touch/etc/[email protected]/etc/#z3c4D [[email protected] desktop]# ls-d/etc/[^a-za-z][a- Za-z]*/etc/[email protected]/etc/[email protected]/etc/#z3c4D [[email protected] desktop]# ls-d/etc/[^[:alpha:]][[:a Lpha:]]*/etc/[email protected]/etc/[email protected]/etc/#z3c4D

4. In the/tmp directory, create a file that starts with Tfile, followed by the current date and time, with a filename such as: tfile-2016-05-27-09-32-22.

touch/tmp/tfile-$ (date +%f-%h-%m-%s) or touch/tmp/tfile-' Date +%y-%m-%d-%h-%m-%s '

Command Test and Results

[Email protected] desktop]# touch/tmp/tfile-$ (date +%f-%h-%m-%s) [[email protected] desktop]# touch/tmp/tfile-' Date +% y-%m-%d-%h-%m-%s ' [[email protected] desktop]# ls/tmp/tfile*/tmp/tfile-2017-05-12-09-50-18/tmp/ Tfile-2017-05-12-09-50-23

5. Copy all the files or directories in the/etc directory to the/tmp/mytest1 directory that begin with P and do not end with a number.

Cp-r/etc/p*[^0-9]/tmp/mytest1 or cp-r/etc/p*[^[:d igit:]]/tmp/mytest1

Command Test and Results

[[email protected]alhost desktop]# mkdir -p /tmp/mytest1 ; cp -r  /etc/p*[^0-9] /tmp/mytest1 ; ls /tmp/mytest1pam.d    pbm2ppa.conf   plymouth      popt.d   prelink.conf.d   profile.d  purplepasswd   pinforc       pm             postfix  printcap         protocolspasswd-  pki            pnm2ppa.conf  ppp      profile          pulse[[email protected] desktop]# rm -rf / tmp/mytest1 ; mkdir -p /tmp/mytest1 ; cp -r /etc/p*[^[:d igit:]] / tmp/mytest1 ; ls /tmp/mytest1pam.d    pbm2ppa.conf  plymouth       Popt.d   prelink.conf.d  profile.d  purplepasswd   pinforc        pm             postfix  printcap        protocolspasswd-   pki           pnm2ppa.conf  ppp       profile         pulse

6. Copy all files or directories ending with. D in the/etc directory into the/tmp/mytest2 directory.

Cp-r/etc/*.d/tmp/mytest2

Command Test and Results

[[email protected] desktop]# mkdir -p /tmp/mytest2 ; cp -r /etc/* .d /tmp/mytest2 ; ls /tmp/mytest2bash_completion.d  ipsec.d          profile.d      rwtab.dbinfmt.d            ld.so.conf.d    rc0.d           sane.dchkconfig.d         libibverbs.d    rc1.d           Setuptool.dcron.d             logrotate.d      rc2.d           statetab.ddepmod.d           modprobe.d       rc3.d          sudoers.ddnsmasq.d           modules-load.d  rc4.d           sysctl.ddracut.conf.d      my.cnf.d         rc5.d          tmpfiles.dexports.d           oddjobd.conf.d  rc6.d           usb_modeswitch.dgdbinit.d           pam.d           rc.d            xinetd.dgrub.d              popt.d          request-key.d   Yum.repos.dinit.d  &nbSp;          prelink.conf.d  rsyslog.d 

7. Copy all files in the/etc/directory that begin with L or M or N and end with. conf to the/TMP/MYTEST3 directory.

Cp-r/etc/[lmn]*.conf/tmp/mytest3 or Cp-r/etc/{l,m,n}*.conf/tmp/mytest3

Command Test and Results

Mkdir-p/tmp/mytest3; Cp-r/etc/[lmn]*.conf/tmp/mytest3; ls/tmp/mytest3ld.so.conf locale.conf mke2fs.conf nsswitch.conflibaudit.conf logrotate.conf mtools.conf nu mad.conflibuser.conf man_db.conf Nfsmount.confrm-rf/tmp/mytest3; Mkdir-p/tmp/mytest3; Cp-r/etc/{l,m,n}*.conf/tmp/mytest3; ls/tmp/mytest3ld.so.conf locale.conf mke2fs.conf nsswitch.conflibaudit.conf logrotate.conf mtools.conf nu mad.conflibuser.conf man_db.conf nfsmount.conf

Linux Base entry three week job "Linux Micro Jobs"