shell入门20-参数传递之xargs
2023-01-03 本文已影响0人
万州客
xargs用得好，算是高手了。
一，介绍
image.png
image.png
二，练习
[root@127 shell_demo]# cut -d: -f1 /etc/passwd
root
bin
daemon
adm
lp
sync
shutdown
halt
mail
operator
games
ftp
nobody
systemd-network
dbus
polkitd
sshd
postfix
chengang
tss
redis
mysql
saslauth
telegraf
apache
ntp
sky
nginx
[root@127 shell_demo]# cut -d: -f1 /etc/passwd |echo
[root@127 shell_demo]# find /etc -name *.conf -type f
/etc/resolv.conf
/etc/pki/ca-trust/ca-legacy.conf
/etc/yum/pluginconf.d/fastestmirror.conf
/etc/yum/pluginconf.d/langpacks.conf
/etc/yum/protected.d/systemd.conf
/etc/yum/version-groups.conf
/etc/lvm/lvm.conf
/etc/lvm/lvmlocal.conf
/etc/asound.conf
/etc/libuser.conf
/etc/snmp/snmpd.conf
/etc/snmp/snmptrapd.conf
/etc/openldap/ldap.conf
/etc/dracut.conf
/etc/yum.conf
/etc/depmod.d/dist.conf
/etc/modprobe.d/tuned.conf
/etc/modprobe.d/firewalld-sysctls.conf
/etc/modprobe.d/dccp-blacklist.conf
/etc/rsyslog.d/listen.conf
/etc/host.conf
/etc/systemd/bootchart.conf
/etc/systemd/coredump.conf
/etc/systemd/journald.conf
/etc/systemd/logind.conf
/etc/systemd/system/redis-sentinel.service.d/limit.conf
/etc/systemd/system/redis.service.d/limit.conf
/etc/systemd/system.conf
/etc/systemd/user.conf
/etc/dbus-1/system.d/org.freedesktop.hostname1.conf
/etc/dbus-1/system.d/org.freedesktop.import1.conf
/etc/dbus-1/system.d/org.freedesktop.locale1.conf
/etc/dbus-1/system.d/org.freedesktop.login1.conf
/etc/dbus-1/system.d/org.freedesktop.machine1.conf
/etc/dbus-1/system.d/org.freedesktop.systemd1.conf
/etc/dbus-1/system.d/org.freedesktop.timedate1.conf
/etc/dbus-1/system.d/org.freedesktop.PolicyKit1.conf
/etc/dbus-1/system.d/wpa_supplicant.conf
/etc/dbus-1/system.d/nm-dispatcher.conf
/etc/dbus-1/system.d/nm-ifcfg-rh.conf
/etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf
/etc/dbus-1/system.d/teamd.conf
/etc/dbus-1/system.d/com.redhat.tuned.conf
/etc/dbus-1/system.d/FirewallD.conf
/etc/dbus-1/system.d/org.selinux.conf
/etc/dbus-1/session.conf
/etc/dbus-1/system.conf
/etc/udev/udev.conf
/etc/NetworkManager/NetworkManager.conf
/etc/X11/xorg.conf.d/00-keyboard.conf
/etc/prelink.conf.d/nss-softokn-prelink.conf
/etc/prelink.conf.d/fipscheck.conf
/etc/prelink.conf.d/grub2.conf
/etc/ld.so.conf
/etc/ld.so.conf.d/bind-export-x86_64.conf
/etc/ld.so.conf.d/kernel-3.10.0-1127.el7.x86_64.conf
/etc/ld.so.conf.d/kernel-3.10.0-1160.59.1.el7.x86_64.conf
/etc/ld.so.conf.d/dyninst-x86_64.conf
/etc/ld.so.conf.d/tix-x86_64.conf
/etc/ld.so.conf.d/mysql-x86_64.conf
/etc/logrotate.conf
/etc/nsswitch.conf
/etc/sestatus.conf
/etc/sysctl.conf
/etc/wpa_supplicant/wpa_supplicant.conf
/etc/libaudit.conf
/etc/selinux/semanage.conf
/etc/selinux/targeted/setrans.conf
/etc/krb5.conf
/etc/security/access.conf
/etc/security/chroot.conf
/etc/security/group.conf
/etc/security/limits.conf
/etc/security/limits.d/20-nproc.conf
/etc/security/namespace.conf
/etc/security/pam_env.conf
/etc/security/sepermit.conf
/etc/security/time.conf
/etc/security/pwquality.conf
/etc/sasl2/smtpd.conf
/etc/plymouth/plymouthd.conf
/etc/tuned/tuned-main.conf
/etc/firewalld/firewalld.conf
/etc/kdump.conf
/etc/audisp/audispd.conf
/etc/audisp/plugins.d/af_unix.conf
/etc/audisp/plugins.d/syslog.conf
/etc/audit/auditd.conf
/etc/rsyslog.conf
/etc/man_db.conf
/etc/sudo-ldap.conf
/etc/sudo.conf
/etc/e2fsck.conf
/etc/mke2fs.conf
/etc/vconsole.conf
/etc/locale.conf
/etc/rsyncd.conf
/etc/tcsd.conf
/etc/fonts/conf.d/25-no-bitmap-fedora.conf
/etc/fonts/fonts.conf
/etc/redis-sentinel.conf
/etc/redis.conf
/etc/telegraf/telegraf.conf
/etc/httpd/conf/httpd.conf
/etc/httpd/conf.d/autoindex.conf
/etc/httpd/conf.d/userdir.conf
/etc/httpd/conf.d/welcome.conf
/etc/httpd/conf.d/cacti.conf
/etc/httpd/conf.modules.d/00-base.conf
/etc/httpd/conf.modules.d/00-dav.conf
/etc/httpd/conf.modules.d/00-lua.conf
/etc/httpd/conf.modules.d/00-mpm.conf
/etc/httpd/conf.modules.d/00-proxy.conf
/etc/httpd/conf.modules.d/00-systemd.conf
/etc/httpd/conf.modules.d/01-cgi.conf
/etc/ntp.conf
[root@127 shell_demo]# find /etc -name *.conf -type f |echo
[root@127 shell_demo]# cat /var/run/crond.pid |kill
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
[root@127 shell_demo]# echo /tmp/
11.conf a.sh b.sh conf.log etc/ .ICE-unix/ root/ usr/
22.conf a.txt b.txt c.sh filebak.sh nounset.sh sh.log .X11-unix/
33.conf A.txt B.txt errexit.sh .font-unix/ passwd .Test-unix/ .XIM-unix/
[root@127 shell_demo]# echo /tmp/b.sh |rm
rm: missing operand
Try 'rm --help' for more information.
[root@127 shell_demo]# cat /etc/redhat-release |xargs
CentOS Linux release 7.9.2009 (Core)
[root@127 shell_demo]# cat /etc/redhat-release |xargs echo
CentOS Linux release 7.9.2009 (Core)
[root@127 shell_demo]# cut -d: -f1 /etc/passwd |xargs echo
root bin daemon adm lp sync shutdown halt mail operator games ftp nobody systemd-network dbus polkitd sshd postfix chengang tss redis mysql saslauth telegraf apache ntp sky nginx
[root@127 shell_demo]# cut -d: -f1 /etc/passwd |xargs
root bin daemon adm lp sync shutdown halt mail operator games ftp nobody systemd-network dbus polkitd sshd postfix chengang tss redis mysql saslauth telegraf apache ntp sky nginx
[root@127 shell_demo]# find /etc -name *.conf -type d
[root@127 shell_demo]# find /etc -name *.conf -type f |xargs echo
/etc/resolv.conf /etc/pki/ca-trust/ca-legacy.conf /etc/yum/pluginconf.d/fastestmirror.conf /etc/yum/pluginconf.d/langpacks.conf /etc/yum/protected.d/systemd.conf /etc/yum/version-groups.conf /etc/lvm/lvm.conf /etc/lvm/lvmlocal.conf /etc/asound.conf /etc/libuser.conf /etc/snmp/snmpd.conf /etc/snmp/snmptrapd.conf /etc/openldap/ldap.conf /etc/dracut.conf /etc/yum.conf /etc/depmod.d/dist.conf /etc/modprobe.d/tuned.conf /etc/modprobe.d/firewalld-sysctls.conf /etc/modprobe.d/dccp-blacklist.conf /etc/rsyslog.d/listen.conf /etc/host.conf /etc/systemd/bootchart.conf /etc/systemd/coredump.conf /etc/systemd/journald.conf /etc/systemd/logind.conf /etc/systemd/system/redis-sentinel.service.d/limit.conf /etc/systemd/system/redis.service.d/limit.conf /etc/systemd/system.conf /etc/systemd/user.conf /etc/dbus-1/system.d/org.freedesktop.hostname1.conf /etc/dbus-1/system.d/org.freedesktop.import1.conf /etc/dbus-1/system.d/org.freedesktop.locale1.conf /etc/dbus-1/system.d/org.freedesktop.login1.conf /etc/dbus-1/system.d/org.freedesktop.machine1.conf /etc/dbus-1/system.d/org.freedesktop.systemd1.conf /etc/dbus-1/system.d/org.freedesktop.timedate1.conf /etc/dbus-1/system.d/org.freedesktop.PolicyKit1.conf /etc/dbus-1/system.d/wpa_supplicant.conf /etc/dbus-1/system.d/nm-dispatcher.conf /etc/dbus-1/system.d/nm-ifcfg-rh.conf /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf /etc/dbus-1/system.d/teamd.conf /etc/dbus-1/system.d/com.redhat.tuned.conf /etc/dbus-1/system.d/FirewallD.conf /etc/dbus-1/system.d/org.selinux.conf /etc/dbus-1/session.conf /etc/dbus-1/system.conf /etc/udev/udev.conf /etc/NetworkManager/NetworkManager.conf /etc/X11/xorg.conf.d/00-keyboard.conf /etc/prelink.conf.d/nss-softokn-prelink.conf /etc/prelink.conf.d/fipscheck.conf /etc/prelink.conf.d/grub2.conf /etc/ld.so.conf /etc/ld.so.conf.d/bind-export-x86_64.conf /etc/ld.so.conf.d/kernel-3.10.0-1127.el7.x86_64.conf /etc/ld.so.conf.d/kernel-3.10.0-1160.59.1.el7.x86_64.conf /etc/ld.so.conf.d/dyninst-x86_64.conf /etc/ld.so.conf.d/tix-x86_64.conf /etc/ld.so.conf.d/mysql-x86_64.conf /etc/logrotate.conf /etc/nsswitch.conf /etc/sestatus.conf /etc/sysctl.conf /etc/wpa_supplicant/wpa_supplicant.conf /etc/libaudit.conf /etc/selinux/semanage.conf /etc/selinux/targeted/setrans.conf /etc/krb5.conf /etc/security/access.conf /etc/security/chroot.conf /etc/security/group.conf /etc/security/limits.conf /etc/security/limits.d/20-nproc.conf /etc/security/namespace.conf /etc/security/pam_env.conf /etc/security/sepermit.conf /etc/security/time.conf /etc/security/pwquality.conf /etc/sasl2/smtpd.conf /etc/plymouth/plymouthd.conf /etc/tuned/tuned-main.conf /etc/firewalld/firewalld.conf /etc/kdump.conf /etc/audisp/audispd.conf /etc/audisp/plugins.d/af_unix.conf /etc/audisp/plugins.d/syslog.conf /etc/audit/auditd.conf /etc/rsyslog.conf /etc/man_db.conf /etc/sudo-ldap.conf /etc/sudo.conf /etc/e2fsck.conf /etc/mke2fs.conf /etc/vconsole.conf /etc/locale.conf /etc/rsyncd.conf /etc/tcsd.conf /etc/fonts/conf.d/25-no-bitmap-fedora.conf /etc/fonts/fonts.conf /etc/redis-sentinel.conf /etc/redis.conf /etc/telegraf/telegraf.conf /etc/httpd/conf/httpd.conf /etc/httpd/conf.d/autoindex.conf /etc/httpd/conf.d/userdir.conf /etc/httpd/conf.d/welcome.conf /etc/httpd/conf.d/cacti.conf /etc/httpd/conf.modules.d/00-base.conf /etc/httpd/conf.modules.d/00-dav.conf /etc/httpd/conf.modules.d/00-lua.conf /etc/httpd/conf.modules.d/00-mpm.conf /etc/httpd/conf.modules.d/00-proxy.conf /etc/httpd/conf.modules.d/00-systemd.conf /etc/httpd/conf.modules.d/01-cgi.conf /etc/ntp.conf
[root@127 shell_demo]# find -name "*.txt"
./test.txt
[root@127 shell_demo]# find -name "*.txt" |xargs grep "abc"
[root@127 shell_demo]# find -name "*.txt" |xargs grep "e"
hello
[root@127 shell_demo]# find /etc -name *.conf -type f |xargs ls -l
-rw-r--r--. 1 root root 55 Aug 8 2019 /etc/asound.conf
-rw-r-----. 1 root root 246 Aug 8 2019 /etc/audisp/audispd.conf
-rw-r-----. 1 root root 358 Aug 8 2019 /etc/audisp/plugins.d/af_unix.conf
-rw-r-----. 1 root root 517 Aug 8 2019 /etc/audisp/plugins.d/syslog.conf
-rw-r-----. 1 root root 805 Aug 8 2019 /etc/audit/auditd.conf
-rw-r--r--. 1 root root 838 Sep 30 2020 /etc/dbus-1/session.conf
-rw-r--r--. 1 root root 833 Sep 30 2020 /etc/dbus-1/system.conf
-rw-r--r--. 1 root root 587 Mar 22 2019 /etc/dbus-1/system.d/com.redhat.tuned.conf
-rw-r--r--. 1 root root 1084 Apr 28 2021 /etc/dbus-1/system.d/FirewallD.conf
-rw-r--r--. 1 root root 465 Nov 17 2020 /etc/dbus-1/system.d/nm-dispatcher.conf
-rw-r--r--. 1 root root 387 Nov 17 2020 /etc/dbus-1/system.d/nm-ifcfg-rh.conf
-rw-r--r--. 1 root root 947 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.hostname1.conf
-rw-r--r--. 1 root root 2527 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.import1.conf
-rw-r--r--. 1 root root 937 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.locale1.conf
-rw-r--r--. 1 root root 8534 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.login1.conf
-rw-r--r--. 1 root root 3726 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.machine1.conf
-rw-r--r--. 1 root root 9740 Nov 17 2020 /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf
-rw-r--r--. 1 root root 638 Jan 26 2022 /etc/dbus-1/system.d/org.freedesktop.PolicyKit1.conf
-rw-r--r--. 1 root root 10118 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.systemd1.conf
-rw-r--r--. 1 root root 947 Jan 14 2022 /etc/dbus-1/system.d/org.freedesktop.timedate1.conf
-rw-r--r--. 1 root root 535 Apr 1 2020 /etc/dbus-1/system.d/org.selinux.conf
-rw-r--r--. 1 root root 409 Dec 9 2018 /etc/dbus-1/system.d/teamd.conf
-rw-r--r--. 1 root root 1096 Mar 16 2021 /etc/dbus-1/system.d/wpa_supplicant.conf
-rw-r--r--. 1 root root 116 Apr 1 2020 /etc/depmod.d/dist.conf
-rw-r--r--. 1 root root 1285 Sep 30 2020 /etc/dracut.conf
-rw-r--r--. 1 root root 112 Sep 30 2020 /etc/e2fsck.conf
-rw-r--r--. 1 root root 2706 Apr 28 2021 /etc/firewalld/firewalld.conf
-rw-r--r--. 1 root root 1160 Oct 30 2018 /etc/fonts/conf.d/25-no-bitmap-fedora.conf
-rw-r--r--. 1 root root 2416 Oct 31 2018 /etc/fonts/fonts.conf
-rw-r--r--. 1 root root 9 Jun 7 2013 /etc/host.conf
-rw-r--r-- 1 root root 2926 Mar 24 2022 /etc/httpd/conf.d/autoindex.conf
-rw-r--r-- 1 root root 1505 Nov 2 2021 /etc/httpd/conf.d/cacti.conf
-rw-r--r-- 1 root root 1252 Jan 8 2022 /etc/httpd/conf.d/userdir.conf
-rw-r--r-- 1 root root 824 Jan 14 2022 /etc/httpd/conf.d/welcome.conf
-rw-r--r-- 1 root root 11753 Jan 14 2022 /etc/httpd/conf/httpd.conf
-rw-r--r-- 1 root root 3739 Jan 14 2022 /etc/httpd/conf.modules.d/00-base.conf
-rw-r--r-- 1 root root 139 Jan 8 2022 /etc/httpd/conf.modules.d/00-dav.conf
-rw-r--r-- 1 root root 41 Jan 8 2022 /etc/httpd/conf.modules.d/00-lua.conf
-rw-r--r-- 1 root root 742 Jan 14 2022 /etc/httpd/conf.modules.d/00-mpm.conf
-rw-r--r-- 1 root root 957 Jan 14 2022 /etc/httpd/conf.modules.d/00-proxy.conf
-rw-r--r-- 1 root root 88 Jan 8 2022 /etc/httpd/conf.modules.d/00-systemd.conf
-rw-r--r-- 1 root root 451 Jan 8 2022 /etc/httpd/conf.modules.d/01-cgi.conf
-rw-r--r--. 1 root root 7274 Mar 19 2022 /etc/kdump.conf
-rw-r--r--. 1 root root 646 Sep 30 2020 /etc/krb5.conf
-rw-r--r--. 1 root root 28 Feb 28 2013 /etc/ld.so.conf
-rw-r--r--. 1 root root 26 Feb 24 2022 /etc/ld.so.conf.d/bind-export-x86_64.conf
-rw-r--r--. 1 root root 19 Aug 9 2019 /etc/ld.so.conf.d/dyninst-x86_64.conf
-r--r--r--. 1 root root 63 Apr 1 2020 /etc/ld.so.conf.d/kernel-3.10.0-1127.el7.x86_64.conf
-r--r--r--. 1 root root 63 Feb 24 2022 /etc/ld.so.conf.d/kernel-3.10.0-1160.59.1.el7.x86_64.conf
-rw-r--r-- 1 root root 17 Jan 5 2021 /etc/ld.so.conf.d/mysql-x86_64.conf
-rw-r--r--. 1 root root 18 Jun 10 2014 /etc/ld.so.conf.d/tix-x86_64.conf
-rw-r-----. 1 root root 191 Mar 2 2019 /etc/libaudit.conf
-rw-r--r--. 1 root root 2391 Oct 13 2013 /etc/libuser.conf
-rw-r--r--. 1 root root 19 Mar 19 2022 /etc/locale.conf
-rw-r--r--. 1 root root 662 Jul 31 2013 /etc/logrotate.conf
-rw-r--r--. 1 root root 95859 Apr 28 2021 /etc/lvm/lvm.conf
-rw-r--r--. 1 root root 2301 Apr 28 2021 /etc/lvm/lvmlocal.conf
-rw-r--r--. 1 root root 5171 Oct 31 2018 /etc/man_db.conf
-rw-r--r--. 1 root root 1106 Sep 30 2020 /etc/mke2fs.conf
-rw-r--r--. 1 root root 215 Feb 24 2022 /etc/modprobe.d/dccp-blacklist.conf
-rw-r--r--. 1 root root 166 Apr 28 2021 /etc/modprobe.d/firewalld-sysctls.conf
-rw-r--r--. 1 root root 674 Mar 22 2019 /etc/modprobe.d/tuned.conf
-rw-r--r--. 1 root root 2145 Nov 17 2020 /etc/NetworkManager/NetworkManager.conf
-rw-r--r--. 1 root root 1949 Mar 19 2022 /etc/nsswitch.conf
-rw-r--r-- 1 root root 2000 Nov 28 2019 /etc/ntp.conf
-rw-r--r--. 1 root root 363 Feb 24 2022 /etc/openldap/ldap.conf
-rw-r--r--. 1 root root 980 Sep 23 2021 /etc/pki/ca-trust/ca-legacy.conf
-rw-r--r--. 1 root root 72 Oct 2 2020 /etc/plymouth/plymouthd.conf
-rw-r--r--. 1 root root 57 Aug 2 2017 /etc/prelink.conf.d/fipscheck.conf
-rw-r--r--. 1 root root 220 Oct 14 2021 /etc/prelink.conf.d/grub2.conf
-rw-r--r--. 1 root root 184 Oct 14 2021 /etc/prelink.conf.d/nss-softokn-prelink.conf
-rw-r----- 1 redis root 46729 Oct 26 2018 /etc/redis.conf
-rw-r----- 1 redis root 7642 Oct 26 2018 /etc/redis-sentinel.conf
-rw-r--r-- 1 root root 130 Jan 1 09:45 /etc/resolv.conf
-rw-r--r--. 1 root root 458 Apr 1 2020 /etc/rsyncd.conf
-rw-r--r--. 1 root root 3232 Sep 30 2020 /etc/rsyslog.conf
-rw-r--r--. 1 root root 49 Jan 14 2022 /etc/rsyslog.d/listen.conf
-rw-r--r--. 1 root root 49 Apr 1 2020 /etc/sasl2/smtpd.conf
-rw-r--r--. 1 root root 4564 Apr 1 2020 /etc/security/access.conf
-rw-r--r--. 1 root root 82 Apr 1 2020 /etc/security/chroot.conf
-rw-r--r--. 1 root root 3635 Apr 1 2020 /etc/security/group.conf
-rw-r--r--. 1 root root 2422 Apr 1 2020 /etc/security/limits.conf
-rw-r--r--. 1 root root 191 Apr 1 2020 /etc/security/limits.d/20-nproc.conf
-rw-r--r--. 1 root root 1440 Apr 1 2020 /etc/security/namespace.conf
-rw-r--r--. 1 root root 2972 Apr 1 2020 /etc/security/pam_env.conf
-rw-r--r--. 1 root root 1718 Dec 7 2011 /etc/security/pwquality.conf
-rw-r--r--. 1 root root 419 Apr 1 2020 /etc/security/sepermit.conf
-rw-r--r--. 1 root root 2179 Apr 1 2020 /etc/security/time.conf
-rw-r--r--. 1 root root 2321 Oct 31 2018 /etc/selinux/semanage.conf
-rw-r--r--. 1 root root 607 Nov 17 2020 /etc/selinux/targeted/setrans.conf
-rw-r--r--. 1 root root 216 Apr 1 2020 /etc/sestatus.conf
-rw------- 1 root root 18861 Apr 6 2022 /etc/snmp/snmpd.conf
-rw------- 1 root root 220 Apr 6 2022 /etc/snmp/snmptrapd.conf
-rw-r-----. 1 root root 1786 Sep 30 2020 /etc/sudo.conf
-rw-r-----. 1 root root 3181 Sep 30 2020 /etc/sudo-ldap.conf
-rw-r--r--. 1 root root 449 Nov 17 2020 /etc/sysctl.conf
-rw-r--r--. 1 root root 720 Jan 14 2022 /etc/systemd/bootchart.conf
-rw-r--r--. 1 root root 615 Jan 14 2022 /etc/systemd/coredump.conf
-rw-r--r--. 1 root root 983 Jan 14 2022 /etc/systemd/journald.conf
-rw-r--r--. 1 root root 957 Jan 14 2022 /etc/systemd/logind.conf
-rw-r--r--. 1 root root 1552 Jan 14 2022 /etc/systemd/system.conf
-rw-r--r-- 1 root root 217 Oct 26 2018 /etc/systemd/system/redis-sentinel.service.d/limit.conf
-rw-r--r-- 1 root root 217 Oct 26 2018 /etc/systemd/system/redis.service.d/limit.conf
-rw-r--r--. 1 root root 1127 Jan 14 2022 /etc/systemd/user.conf
-rw-------. 1 tss tss 7046 Aug 4 2017 /etc/tcsd.conf
-rw-r--r-- 1 root root 211844 Apr 7 2022 /etc/telegraf/telegraf.conf
-rw-r--r--. 1 root root 1305 Feb 3 2021 /etc/tuned/tuned-main.conf
-rw-r--r--. 1 root root 49 Jan 14 2022 /etc/udev/udev.conf
-rw-r--r--. 1 root root 37 Mar 19 2022 /etc/vconsole.conf
-rw-------. 1 root root 67 Mar 16 2021 /etc/wpa_supplicant/wpa_supplicant.conf
-rw-r--r--. 1 root root 232 Mar 19 2022 /etc/X11/xorg.conf.d/00-keyboard.conf
-rw-r--r--. 1 root root 970 Oct 2 2020 /etc/yum.conf
-rw-r--r--. 1 root root 279 May 13 2020 /etc/yum/pluginconf.d/fastestmirror.conf
-rw-r--r--. 1 root root 372 Mar 19 2022 /etc/yum/pluginconf.d/langpacks.conf
-rw-r--r--. 1 root root 8 Jan 14 2022 /etc/yum/protected.d/systemd.conf
-rw-r--r--. 1 root root 444 Oct 2 2020 /etc/yum/version-groups.conf
[root@127 shell_demo]# find /etc -name *.conf -type f |xargs wc -l
5 /etc/resolv.conf
24 /etc/pki/ca-trust/ca-legacy.conf
12 /etc/yum/pluginconf.d/fastestmirror.conf
12 /etc/yum/pluginconf.d/langpacks.conf
1 /etc/yum/protected.d/systemd.conf
12 /etc/yum/version-groups.conf
2152 /etc/lvm/lvm.conf
57 /etc/lvm/lvmlocal.conf
3 /etc/asound.conf
89 /etc/libuser.conf
462 /etc/snmp/snmpd.conf
6 /etc/snmp/snmptrapd.conf
18 /etc/openldap/ldap.conf
51 /etc/dracut.conf
26 /etc/yum.conf
6 /etc/depmod.d/dist.conf
25 /etc/modprobe.d/tuned.conf
1 /etc/modprobe.d/firewalld-sysctls.conf
7 /etc/modprobe.d/dccp-blacklist.conf
1 /etc/rsyslog.d/listen.conf
1 /etc/host.conf
26 /etc/systemd/bootchart.conf
21 /etc/systemd/coredump.conf
40 /etc/systemd/journald.conf
34 /etc/systemd/logind.conf
7 /etc/systemd/system/redis-sentinel.service.d/limit.conf
7 /etc/systemd/system/redis.service.d/limit.conf
60 /etc/systemd/system.conf
44 /etc/systemd/user.conf
27 /etc/dbus-1/system.d/org.freedesktop.hostname1.conf
62 /etc/dbus-1/system.d/org.freedesktop.import1.conf
27 /etc/dbus-1/system.d/org.freedesktop.locale1.conf
190 /etc/dbus-1/system.d/org.freedesktop.login1.conf
86 /etc/dbus-1/system.d/org.freedesktop.machine1.conf
220 /etc/dbus-1/system.d/org.freedesktop.systemd1.conf
27 /etc/dbus-1/system.d/org.freedesktop.timedate1.conf
20 /etc/dbus-1/system.d/org.freedesktop.PolicyKit1.conf
25 /etc/dbus-1/system.d/wpa_supplicant.conf
14 /etc/dbus-1/system.d/nm-dispatcher.conf
12 /etc/dbus-1/system.d/nm-ifcfg-rh.conf
151 /etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf
12 /etc/dbus-1/system.d/teamd.conf
16 /etc/dbus-1/system.d/com.redhat.tuned.conf
27 /etc/dbus-1/system.d/FirewallD.conf
19 /etc/dbus-1/system.d/org.selinux.conf
19 /etc/dbus-1/session.conf
19 /etc/dbus-1/system.conf
3 /etc/udev/udev.conf
50 /etc/NetworkManager/NetworkManager.conf
7 /etc/X11/xorg.conf.d/00-keyboard.conf
6 /etc/prelink.conf.d/nss-softokn-prelink.conf
2 /etc/prelink.conf.d/fipscheck.conf
7 /etc/prelink.conf.d/grub2.conf
1 /etc/ld.so.conf
1 /etc/ld.so.conf.d/bind-export-x86_64.conf
1 /etc/ld.so.conf.d/kernel-3.10.0-1127.el7.x86_64.conf
1 /etc/ld.so.conf.d/kernel-3.10.0-1160.59.1.el7.x86_64.conf
1 /etc/ld.so.conf.d/dyninst-x86_64.conf
1 /etc/ld.so.conf.d/tix-x86_64.conf
1 /etc/ld.so.conf.d/mysql-x86_64.conf
35 /etc/logrotate.conf
67 /etc/nsswitch.conf
18 /etc/sestatus.conf
10 /etc/sysctl.conf
3 /etc/wpa_supplicant/wpa_supplicant.conf
7 /etc/libaudit.conf
51 /etc/selinux/semanage.conf
19 /etc/selinux/targeted/setrans.conf
27 /etc/krb5.conf
122 /etc/security/access.conf
4 /etc/security/chroot.conf
106 /etc/security/group.conf
61 /etc/security/limits.conf
6 /etc/security/limits.d/20-nproc.conf
28 /etc/security/namespace.conf
73 /etc/security/pam_env.conf
11 /etc/security/sepermit.conf
65 /etc/security/time.conf
50 /etc/security/pwquality.conf
2 /etc/sasl2/smtpd.conf
3 /etc/plymouth/plymouthd.conf
41 /etc/tuned/tuned-main.conf
69 /etc/firewalld/firewalld.conf
163 /etc/kdump.conf
12 /etc/audisp/audispd.conf
14 /etc/audisp/plugins.d/af_unix.conf
14 /etc/audisp/plugins.d/syslog.conf
37 /etc/audit/auditd.conf
91 /etc/rsyslog.conf
131 /etc/man_db.conf
86 /etc/sudo-ldap.conf
57 /etc/sudo.conf
3 /etc/e2fsck.conf
58 /etc/mke2fs.conf
2 /etc/vconsole.conf
1 /etc/locale.conf
20 /etc/rsyncd.conf
191 /etc/tcsd.conf
44 /etc/fonts/conf.d/25-no-bitmap-fedora.conf
88 /etc/fonts/fonts.conf
197 /etc/redis-sentinel.conf
1052 /etc/redis.conf
5980 /etc/telegraf/telegraf.conf
353 /etc/httpd/conf/httpd.conf
94 /etc/httpd/conf.d/autoindex.conf
36 /etc/httpd/conf.d/userdir.conf
22 /etc/httpd/conf.d/welcome.conf
57 /etc/httpd/conf.d/cacti.conf
77 /etc/httpd/conf.modules.d/00-base.conf
3 /etc/httpd/conf.modules.d/00-dav.conf
1 /etc/httpd/conf.modules.d/00-lua.conf
19 /etc/httpd/conf.modules.d/00-mpm.conf
16 /etc/httpd/conf.modules.d/00-proxy.conf
2 /etc/httpd/conf.modules.d/00-systemd.conf
14 /etc/httpd/conf.modules.d/01-cgi.conf
58 /etc/ntp.conf
14136 total
[root@127 shell_demo]# echo "test" > /tmp/test.txt
[root@127 shell_demo]# echo /tmp/test.txt |xargs rm
[root@127 shell_demo]# ls /tmp/test.txt
ls: cannot access /tmp/test.txt: No such file or directory
[root@127 shell_demo]# touch "hello world.txt"
[root@127 shell_demo]# touch "ni hao.txt"
[root@127 shell_demo]# find ./ -name "*txt"
./hello world.txt
./ni hao.txt
./test.txt
[root@127 shell_demo]# find ./ -name "*.txt" |xargs rm
rm: cannot remove ‘./hello’: No such file or directory
rm: cannot remove ‘world.txt’: No such file or directory
rm: cannot remove ‘./ni’: No such file or directory
rm: cannot remove ‘hao.txt’: No such file or directory
[root@127 shell_demo]# find ./ -name "*.txt" -print0|xargs -0 rm
[root@127 shell_demo]# find ./ -name "*txt"
[root@127 shell_demo]# xargs -a
xargs: option requires an argument -- 'a'
Usage: xargs [OPTION]... COMMAND INITIAL-ARGS...
Run COMMAND with arguments INITIAL-ARGS and more arguments read from input.
Mandatory arguments to long options are mandatory for short options too.
Non-mandatory arguments are indicated by [square brackets]
-0, --null Items are separated by a null, not whitespace.
Disables quote and backslash processing
-a, --arg-file=FILE Read arguments from FILE, not standard input
-d, --delimiter=CHARACTER Input items are separated by CHARACTER, not by
blank space. Disables quote and backslash
processing
-E END If END occurs as a line of input, the rest of
the input is ignored.
-e [END], --eof[=END] Equivalent to -E END if END is specified.
Otherwise, there is no end-of-file string
--help Print a summary of the options to xargs.
-I R same as --replace=R (R must be specified)
-i,--replace=[R] Replace R in initial arguments with names
read from standard input. If R is
unspecified, assume {}
-L,-l, --max-lines=MAX-LINES Use at most MAX-LINES nonblank input lines per
command line
-l Use at most one nonblank input line per
command line
-n, --max-args=MAX-ARGS Use at most MAX-ARGS arguments per command
line
-P, --max-procs=MAX-PROCS Run up to max-procs processes at a time
-p, --interactive Prompt before running commands
--process-slot-var=VAR Set environment variable VAR in child
processes
-r, --no-run-if-empty If there are no arguments, run no command.
If this option is not given, COMMAND will be
run at least once.
-s, --max-chars=MAX-CHARS Limit commands to MAX-CHARS at most
--show-limits Show limits on command-line length.
-t, --verbose Print commands before executing them
--version Print the version number
-x, --exit Exit if the size (see -s) is exceeded
Report bugs to <bug-findutils@gnu.org>.
[root@127 shell_demo]# xargs -a /etc/redhat-release echo
CentOS Linux release 7.9.2009 (Core)
[root@127 shell_demo]# xargs -a /etc/hostname
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.1.111 localhost 192.168.1.111 sky
[root@127 shell_demo]#
[root@127 shell_demo]#
[root@127 shell_demo]#
[root@127 shell_demo]# seq 5 |xargs
1 2 3 4 5
[root@127 shell_demo]# seq 5 |xargs -n 2
1 2
3 4
5
[root@127 shell_demo]# seq 5 |xargs -n 3
1 2 3
4 5
[root@127 shell_demo]# echo "helloatheworld" | xargs
helloatheworld
[root@127 shell_demo]# echo "helloatheworld" | xargs -da
hello theworld
[root@127 shell_demo]# touch {a,b,c}.txt
[root@127 shell_demo]# ls *.txt|xargs -I{} cp {} /tmp/
[root@127 shell_demo]# rm -rf /tmp/{a,b,c}.txt
[root@127 shell_demo]# ls *.txt |xargs -I[] cp [] /tmp/
[root@127 shell_demo]# rm -rf /tmp/{a,b,c}.txt
[root@127 shell_demo]# ls *.txt |xargs -I% cp % /tmp/
[root@127 shell_demo]# ls /tmp/
11.conf 33.conf a.txt b.sh B.txt c.sh errexit.sh filebak.sh passwd sh.log
22.conf a.sh A.txt b.txt conf.log c.txt etc nounset.sh root usr
[root@127 shell_demo]# rm -rf /tmp/{a,b,c}.txt
[root@127 shell_demo]# rm -rf /tmp/{a,b,c}.txt
[root@127 shell_demo]# rm -rf /tmp/{a,b,c}.txt
