Zi 字媒體

N個你可能不曾用過的Linux命令 資料來源: https://mp.weixin.qq.com/s?__biz=MzIwNTc4NTEwOQ==&mid=2247487971&idx=2&sn=9681f579dba483e2361aeb49fa079962&chksm=972ac099a05d498ff4c901a927bf8d1e067a08cc5055810846beb53422e828bd1df588381abd&scene=126&sessionid=1585181458&key=d1ea58609fa1095895e8e7c3c94fe4ac13483228c82e90f966d4886ee71fe746b11afcb77f7933b596a9930a75f809e1053014784aabff34757d45f6169e5edad1b2f99c6d989642685b1cf52c4c54d4&ascene=1&uin=MjIwODk2NDgxNw==&devicetype=Windows+10&version=62080079&lang=zh_TW&exportkey=AvqlSHiLcZiovp8Co/S8l4s=&pass_ticket=gwuYjl12SVj0uTB9Wc+vBkx7KJvIo+dbFW8R3UxwJwOqHqbIz07uuIa4yFs7KuQK 1）pgrep[查詢程式/進程 ID] pgrep名字前有個p，我們可以猜到這和進展相關，又是grep，當然這是進程相關的grep命令。不過，這個命令主要是用作推進ID的 $ pgrep -u hchen 22441 22444 等同 ps -ef | egrep ^hchen | awk {print $2} 2）pstree[查詢程式/進程的樹狀圖] 這個命令可以以樹形的方式列出進展 [hchen@RHELSVR5 ~]$ pstree init-+-acpid |-auditd-+-python | `-{auditd} |-automount---4*[{automount}] |-backup.sh---sleep |-dbus-daemon |-events/0 |-events/1 |-hald---hald-runner---hald-addon-acpi |-httpd---10*[httpd] |-irqbalance |-khelper |-klogd |-ksoftirqd/0 |-ksoftirqd/1 |-kthread-+-aio/0 | |-aio/1 | |-ata/0 | |-ata/1 | |-ata_aux | |-cqueue/0 | |-cqueue/1 | |-kacpid | |-kauditd | |-kblockd/0 | |-kblockd/1 | |-kedac | |-khubd | |-6*[kjournald] | |-kmirrord | |-kpsmoused | |-kseriod | |-kswapd0 | |-2*[pdflush] | |-scsi_eh_0 | |-scsi_eh_1 | |-xenbus | `-xenwatch |-migration/0 |-migration/1 |-6*[mingetty] |-3*[multilog] |-mysqld_safe---mysqld---9*[{mysqld}] |-smartd |-sshd---sshd---sshd---bash---pstree |-svscanboot---svscan-+-3*[supervise---run] | |-supervise---qmail-send-+-qmail-clean | | |-qmail-lspawn | | `-qmail-rspawn | `-2*[supervise---tcpserver] |-syslogd |-udevd |-watchdog/0 |-watchdog/1 `-xinetd 3）分割檔案 & 合併檔案 split -b 50m 檔名 LF_ cat LF_* >檔名 [hchen@RHELSVR5 applebak]# ls -l largefile.tar.gz -rw-r--r-- 1 hchen hchen 436774774 04-17 02:00 largefile.tar.gz [hchen@RHELSVR5 applebak]# split -b 50m largefile.tar.gz LF_ [hchen@RHELSVR5]# ls -l LF_* -rw-r--r-- 1 hchen hchen 52428800 05-10 18:34 LF_aa -rw-r--r-- 1 hchen hchen 52428800 05-10 18:34 LF_ab -rw-r--r-- 1 hchen hchen 52428800 05-10 18:34 LF_ac -rw-r--r-- 1 hchen hchen 52428800 05-10 18:34 LF_ad -rw-r--r-- 1 hchen hchen 52428800 05-10 18:34 LF_ae -rw-r--r-- 1 hchen hchen 52428800 05-10 18:35 LF_af -rw-r--r-- 1 hchen hchen 52428800 05-10 18:35 LF_ag -rw-r--r-- 1 hchen hchen 52428800 05-10 18:35 LF_ah -rw-r--r-- 1 hchen hchen 17344374 05-10 18:35 LF_ai [hchen@RHELSVR5]# cat LF_* >largefile.tar.gz 4）ldd[查詢 動態連結檔] 這個命令可以知道你的一個單一文件所使用了動態鏈接庫。 [hchen@RHELSVR5 ~]# ldd /usr/bin/java linux-gate.so.1 => (0x00cd9000) libgij.so.7rh => /usr/lib/libgij.so.7rh (0x00ed3000) libgcj.so.7rh => /usr/lib/libgcj.so.7rh (0x00ed6000) libpthread.so.0 => /lib/i686/nosegneg/libpthread.so.0 (0x00110000) librt.so.1 => /lib/i686/nosegneg/librt.so.1 (0x009c8000) libdl.so.2 => /lib/libdl.so.2 (0x008b5000) libz.so.1 => /usr/lib/libz.so.1 (0x00bee000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00aa7000) libc.so.6 => /lib/i686/nosegneg/libc.so.6 (0x0022f000) libm.so.6 => /lib/i686/nosegneg/libm.so.6 (0x00127000) /lib/ld-linux.so.2 (0x00214000) 5）lsof [列出 特定 人/程式… 所開啟的文件] 可以列出打開了的文件。 [root@RHELSVR5 ~]# lsof | grep TCP httpd 548 apache 4u IPv6 14300967 TCP *:http (LISTEN) httpd 548 apache 6u IPv6 14300972 TCP *:https (LISTEN) httpd 561 apache 4u IPv6 14300967 TCP *:http (LISTEN) httpd 561 apache 6u IPv6 14300972 TCP *:https (LISTEN) sshd 1764 root 3u IPv6 4993 TCP *:ssh (LISTEN) tcpserver 8965 root 3u IPv4 153795500 TCP *:pop3 (LISTEN) mysqld 10202 mysql 10u IPv4 73819697 TCP *:mysql (LISTEN) sshd 10735 root 3u IPv6 160731956 TCP 210.51.0.232:ssh->123.117.239.68:31810 (ESTABLISHED) sshd 10767 hchen 3u IPv6 160731956 TCP 210.51.0.232:ssh->123.117.239.68:31810 (ESTABLISHED) vsftpd 11095 root 3u IPv4 152157957 TCP *:ftp (LISTEN)