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SysAdmin Commands
Debugging
truss executable
/* Trace doing of given command ( useful debugging ) */
truss -f -p <pid of a shell>;
/* Using multiple windows, this can be used to trace setuid/setgid programs */
Arp, ethernet trouble shooting
arp -a .
/* Shows the ethernet address arp table */
arp -d myhost
/* Delete a stale ethernet entry for host myhost */
Disk Commands
du -k .
/* Reports disk space used in Kilobytes */
du -sk .
/* Reports only total disk space used in Kilobytes */
du -sk *|sort -k1,1n
/* Reports total disk space used in Kilobytes in present directory */
du -ad /var | sort -nr
/* Tells you how big the /var files are in reverse order */
fdformat -d -U
/* Format diskette */
/usr/bin/iostat -E
/* Command to display drives statistics */
/bin/mount -F hsfs -o ro /dev/sr0 /cdrom
/* Mount an ISO 9660 CDROM */
newfs -Nv /dev/rdsk/c0t0d0s1
/* To view the superfblocks available */
prtvtoc /dev/rdsk/c0t0d0s2
/* Disk geometry and partitioning info */
quot -af
/* How much space is used by users in kilobytes */
Driver Parameters
ndd /dev/ip \?
/* Shows IP variables in the kernel */
ndd /dev/ip ip_forwarding
/* Tells you if forwarding is on (=1) */
ndd -set /dev/ip ip_forwarding 1
/* Enables IP forwarding between interfaces */
File Manipulation
dos2unix | -ascii <filename>;
/* Converts DOS file formats to Unix */
split
/* Split files into pieces */
[vi] : %s/existing/new/g
/* Search and Replace text in vi */
[vi] :set nu
/* Set line numbers in vi */
[vi] :set ts=[num]
/* Set tab stops in vi */
File System
cat /dev/null >; filename
/* Zero's out the file without breaking pipe */
dd if=/dev/rdsk/... of=/dev/rdsk/... bs=4096
/* Make a mirror image of your boot disk */
df -k | grep dg| awk '{print $6}' |xargs -n 1 umount
/* Unmount all file systems in disk group dg */
fsck -F ufs /dev/rdsk/c0t0d0s0
/* Check a UFS filesystem on c0t0d0s0 */
fsck -F ufs -y /dev/rdsk/c0t0d0s0
/* Check answering yes to all questions */
fsck -F ufs -o b=97472 /dev/rdsk/c0t0d0s0
/* Check using an alternate super block */
gzip -dc file1.tar.gz | tar xf -
/* Unpack .tar.gz files in place */
gzip -d -c tarball.tgz | (cd /[dir];tar xf - ) &
/* Unpacking tarballs to diff location */
ln [-fhns] <source file>; <destination file>;
/* Creating hard links and soft links */
ls -la | awk '{ print $5," ",$9 }' | sort -rn
/* File sizes of current directory */
mount -f pcfs /dev/dsk/c0d0p1 /export/dos
/* Mount DOS fdisk partition from Solaris */
mount -F ufs -o rw,remount /
/* Used to remount root to make it writeable */
mount -o remount,logging /spare
/* Re-mount the ro file system rw and turn on ufs logging */
pax -rw . /newdir
/* Efficient alternative for copying directories */
prtvtoc /dev/rdsk/c0t0d0s2 | fmthard -s - /dev/rdsk/c0t1d0s2
/* Cloning Partitiontables */
tar cvf filename.tar
/* Create a tape (tar) archive */
tar xvf filename.tar
/* Extract a tape (tar) archive */
tar cf - . | (cd /newdir ; tar xf -)
/* Recursively copy files and their permissions */
/sbin/uadmin x x
/* Syncs File Systems and Reboots systems fast */
zcat [cpio file] | cpio -itmv
/* Show the contents of a compressed cpio */
zcat <patch_file.tar.Z | tar xvf -
/* Extract the patch_file that is a compressed tar file */
File Transfer
get filename.suffix |"tar xf -"
/* Undocumented Feature of FTP */
put "| tar cf - ." filename.tar
/* Undocumented Feature of FTP */
find . -depth | cpio -pdmv /path/tobe/copied/to
/* Fast alternative to cp -pr */
sendport
/* Transferring large numbers of files within the same ftp control session */
General
/usr/bin/catman -w
/* Create windex databases for man page directories */
FQ_FILENAME=<fully_qualified_file_name>;; echo ${FQ_FILENAME%/*}
/* Extract directory from fully-qualified file name. */
mailx -H -u <username>;
/* List out mail headers for specified user */
set filec
/* Set file-completion for csh */
uuencode [filename] [filename] | mailx -s "Subject" [user to mail]
/* Send files as attachments */
Hardware
cfgadm
/* Verify reconfigurable hardware resources */
m64config -prconf
/* Print M64 hardware configuration */
m64config -depth 8|24
/* Sets the screen depth of your M64 graphics accelerator */
m64config -res 'video_mode'
/* Change the resolution of your M64 graphics accelerator */
Kernel
/usr/sbin/modinfo
/* Display kernel module information */
/usr/sbin/modload <module>;
/* Load a kernel module */
/usr/sbin/modunload -i <module id>;
/* Unload a kernel module */
nm -x /dev/ksyms | grep OBJ | more
/* Tuneable kernel parameters */
/usr/sbin/sysdef
/* Show system kernal tunable details */
Memory
prtconf | grep Mem
/* Display Memory Size */
Network Information
ndd /dev/arp arp_cache_report
/* Prints ARP table in cache with IP and MAC address */
netstat -a | grep EST | wc -l
/* Displays number active established connections to the localhost */
netstat -k hme0
/* Undocumented netstat command */
netstat -i
/* Show the TCP/IP network interfaces */
netstat -np
/* Similar to arp -a without name resolution */
netstat -r
/* Show network route table */
netstat -rn
/* Displays routing information but bypasses hostname lookup. */
netstat -a | more
/* Show the state of all sockets */
traceroute <ipaddress>;
/* Follow the route to the ipaddress */
Network/Tuning
ifconfig eth0 mtu 1500
/* Change MTU of interface */
ifconfig eth0 10.1.1.1 netmask 255.255.255.255
/* Add an Interface */
/sbin/ifconfig hme0:1 inet 10.210.xx.xxx netmask 255.255.0.0 broadcast 10.210.xxx.xxx
/* Virtual Interfaces */
/sbin/ifconfig hme0:1 up
/* Bring virtual interface up */
/usr/sbin/ndd -set /dev/hme adv_100fdx_cap 1
/* Nailling to 100Mbps */
ndd -set /dev/ip ip_addrs_per_if 1-8192
/* To set more than 256 virtual ip addresses. */
ndd -set /dev/tcp tcp_xmit_hiwat 65535
/* Increase TCP-transmitbuffers */
ndd -set /dev/tcp tcp_recv_hiwat 65535
/* Increase TCP-receivebuffers */
Processes
fuser -uc /var
/* Processes that are running from /var */
kill -HUP `ps -ef | grep [p]roccess | awk '{print $2}'`
/* HUP any related process in one step */
lsof -i TCP:25
/* Mapping port with process */
pfiles <pid>;
/* Shows processes' current open files */
pkill -n <name>;
/* Kill a process by name */
kill `ps -ef | grep program_name | grep -v grep | cut -f8 -d ' '`
/* pkill for solaris 2.6 */
prstat -a
/* An alternative for top command */
/usr/ucb/ps -aux | more
/* Displays CPU % usage for each process in ascending order */
/usr/ucb/ps -auxww | grep <process name>;
/* Gives the full listing of the process (long listing) */
ps -ef | grep -i <string>; | awk '{ print $2 }'
/* Creates list of running PID by */
ps -ef | grep -v "0:00" | more
/* Gives you a list of any process with CPU time more than 0:00 */
ps -ef | more
/* Show all processes running */
ps -eo pid,args
/* List processes in simplified format */
ps -fu oracle|grep pmon
/* See which instances of Oracle are running */
/usr/proc/bin/ptree <pid>;
/* Print the parent/child process 'tree' of a process */
/usr/proc/bin/pwdx <pid>;
/* Print the working directory of a process */
top -b 1
/* Returns the process utilizing the most cpu and quits */
Resource Management
/usr/bin/ldd [filename]
/* List the dynamic dependencies of executable files */
/usr/proc/bin/pmap pid
/* Report address space map a process occupies */
Route Configuration
route add net 128.50.0.0 128.50.1.6 1
/* Adds route to 128.50 network via 128.50.1.6 */
route change 128.50.0.0 128.50.1.5
/* Changes the destination address for a route */
route delete net 128.50.0.0 128.50.1.6
/* Deletes route to 128.50 network */
route get [hostname]
/* Which interface will be used to contact hostname */
route monitor
/* Monitors traffic to the routes */
route flush
/* Removes all entries in the route table */
Searching Items
egrep "patterna|patternb" <filename>;
/* Search for multiple patterns within the same file */
find . -exec egrep -li "str" {} \;
/* Find a string in files starting cwd */
find / -fstype nfs -prune -o fstype autofs -prune -o -name filename -print
/* Find without traversing NFS mounted file systems */
find . -mtime -1 -type f
/* Find recently modified files */
find / -mtime <# of days>;
/* Find files modified during the past # of days */
find . ! -mtime -<days>; | /usr/bin/xargs rm -rf
/* Finds and removes files older than <days>; specified */
find . -type f -exec grep "<sub-string>;" {} \; -print
/* Find files (and content) containing <sub-string>; within directory tree */
find . -type f -exec grep -l "<sub-string>;" {} \;
/* Find filenames containing <sub-string>; within directory tree */
find . -type f -print | xargs grep -i [PATTERN]
/* Recursive grep on files */
find / -user <username>;
/* Find all files owned by <username>; */
find / | grep [file mask]
/* Fast way to search for files */
find <start_path>; -name "<file_name>;" -exec rm -rf {} \;
/* Recursively finds files by name and automatically removes them */
find /proc/*/fd -links 0 -type f -size +2000 -ls
/* Find large files held open by a process */
ls -lR | grep <sub_string>;
/* Fast alternative to find */
Security
echo 'Please go away' >; /etc/nologin
/* Stops users logging in */
find / -perm -0777 -type d -ls
/* Find all your writable directories */
find / -type f -perm -2000 -print
/* Find all SGID files */
find / -type f -perm -4000 -print
/* find all SUID files */
Set Terminal Options
stty erase ^H
/* Sets the Backspace Key to erase */
stty erase ^?
/* Sets the Delete Key to erase */
stty sane
/* Rreset terminal after viewing a binary file. */
tput rmacs
/* Reset to standard char set */
Snoop Your Network
snoop -d pcelx0
/* Watch all network packets on device pcelx0 */
snoop -o /tmp/mylog pcelx0
/* Saves packets from device pcelx0 to a file */
snoop -i /tmp/mylog host1 host2
/* View packets from logfile between host1 & host2 */
snoop -i /tmp/mylog -v -p101
/* Show all info on packet number 101 from a logfile */
snoop -i /tmp/mylog -o /tmp/newlog host1
/* Write a new logfile with all host1 packets */
snoop -s 120
/* Return the first 120 bytes in the packet header */
snoop -v arp
/* Capture arp broadcasts on your network */
Swap File
mkfile -v 10m /export/disk1/myswap
/* Makes a 10 Megabyte swapfile in /export/disk */
mkfile -nv 10m /export/disk1/myswap
/* Makes an empty 10 Megabyte swapfile */
Swap Space
swap -s
/* List the amount of swap space available, also see mkfile */
swap -a /export/disk1/swapfile
/* Add a swapfile */
swap -d /dev/dsk/c0t0d0s4
/* Deletes a swap device */
swap -l
/* List the current swap devices */
System Configuration
drvconfig ; disks
/* Adding hot-plug disks to system */
/usr/sbin/eeprom auto-boot? false
/* Changes eeprom autoboot? setting without going to Ok prompt */
/usr/sbin/eeprom diag-switch? true
/* Set the system to perform diagnostics on the next reboot. */
/usr/sbin/eeprom local-mac-address?=true
/* Multiple Port Network Card Setting */
/usr/sbin/grpck
/* Check /etc/group file syntax */
/usr/sbin/pwck
/* Check /etc/passwd file syntax */
/usr/sbin/sys-unconfig
/* Clear host specific network configuration information */
System Information and Monitoring
coreadm -e log
/* Report global core */
/bin/echo "0t${stamp}>;Y\n<Y=Y" | adb
/* Convert UNIX timestamp to something human-readable */
/usr/sbin/eeprom
/* Show eeprom parameters */
grep "\-root" /var/adm/sulog | grep -v \+ | tail -25
/* List most recent attempts to switch to superuser account. */
isainfo -bv
/* Quickly checkout if machine is in 32 or 64 bit mode */
last
/* Tells who was or still is on the system */
logger -i
/* Log the process ID */
psradm -f [processor id]
/* Take processor offline */
/usr/sbin/prtconf -vp
/* Show system configuration details */
/usr/platform/`/bin/uname -i`/sbin/prtdiag -v
/* System Diagnostics */
prtconf -pv | grep banner-name |awk -F\' ' { print $2 } ' | head -1
/* Show actual model name of machine */
psrinfo | wc -l
/* Display number of processors */
sar -A <time in sec>;
/* Provides cumulative system report. */
sar -a <time in sec>;
/* Report use of file access system routines. */
sar -u
/* Report CPU Utilization */
telnet <remote machine>; 13 | grep ':'
/* Get the time on remote Unix machine */
uname -a
/* Displays system information */
vmstat 10
/* Displays summary of what the system is doing every 10 seconds */
who -b
/* Displays the date of the last system reboot. */
ypcat hosts | sort -n -t. +0 -1 +1 -2 +2 -3 +3 -4
/* Take the input of "ypcat hosts" or "cat /etc/inet/hosts" and sort by IP. */

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